ICZN Opinions 1-100

International Commission on Zoological Nomenclature

ICZN Opinions & Cases

Opinions 1–100

ICZN 1910: Opinion 1 (no Case registration) The meaning of the word "indication" in proviso (a) to Article 25 of the International Code, as respects names published on, or before, 31st December 1930.
Science (New York) 26: 522.
Re-issue: Smithsonian Institution 1910: Publication 1938.
Re-issue: Opinions and Declarations rendered by the ICZN. 1943-1955, vol.1, section A: 73-86. BHL
Re-issue: Opinions and Declarations rendered by the ICZN. 1958, vol.1, section B: 5. BHL

ICZN 1910: Opinion 2 (no Case registration) The nature of a systematic name. Smithsonian Institution 1910: Publication 1938.
Re-issue: Opinions and Declarations rendered by the ICZN. 1943-1955, vol.1, section A: 87-94. BHL
Re-issue: Opinions and Declarations rendered by the ICZN. 1958, vol.1, section B: 5. BHL

ICZN 1910: Opinion 3 (no Case registration) The status of publications dated 1758. Smithsonian Institution 1910: Publication 1938.
Re-issue: Opinions and Declarations rendered by the ICZN. 1943-1955, vol.1, section A: 95-102.BHL
Re-issue: Opinions and Declarations rendered by the ICZN. 1958, vol.1, section B: 6. BHL

ICZN 1910: Opinion 4 (no Case registration) The status of names published as manuscript names. Smithsonian Institution 1910: Publication 1938.
Re-issue: Opinions and Declarations rendered by the ICZN. 1943-1955, vol.1, section A: 103-114. BHL
Re-issue: Opinions and Declarations rendered by the ICZN. 1958, vol.1, section B: 6. BHL

ICZN 1910: Opinion 5 (no Case registration) The status of certain pre-Linnean names reprinted subsequent to 1757. Smithsonian Institution 1910: Publication 1938.
Re-issue: Opinions and Declarations rendered by the ICZN. 1943-1955, vol.1, section A: 115-126. BHL
Re-issue: Opinions and Declarations rendered by the ICZN. 1958, vol.1, section B: 6. BHL

ICZN 1910: Opinion 6 (no Case registration) On the type of a genus "A--", containing two species, "A-- b--" and ''A-- c--", where the generic name in question was published on, or before, 31st December 1930. Smithsonian Institution 1910: Publication 1938.
Re-issue: Opinions and Declarations rendered by the ICZN. 1943-1955, vol.1, section A: 127-138. BHL
Re-issue: Opinions and Declarations rendered by the ICZN. 1958, vol.1, section B: 6-9. BHL

ICZN 1910: Opinion 7 (no Case registration) On the interpretation of the expression "n.g., n.sp." under Article 30(a) of the International Code, as respects generic names published on, or before, 31st December 1930. Smithsonian Institution 1910: Publication 1938.
Re-issue: Opinions and Declarations rendered by the ICZN 1943-1955, vol.1, section A: 139-146. BHL
Re-issue: Opinions and Declarations rendered by the ICZN. 1958, vol.1, section B: 10. BHL

ICZN 1910: Opinion 8 (no Case registration) On the retention of "ii" or "i" in specific patronymic names, under Article 14, third paragraph, and Article 19 of the International Code. Smithsonian Institution 1910: Publication 1938.
Re-issue: Opinions and Declarations rendered by the ICZN. 1943-1955, vol.1, section A: 147-158. BHL
Re-issue: Opinions and Declarations rendered by the ICZN. 1958, vol.1, section B: 11-12. BHL

ICZN 1910: Opinion 9 (no Case registration) The use of the name of a composite genus for a component part requiring a name, where the name so used was published on, or before, 31st December 1930. Smithsonian Institution 1910: Publication 1938.
Re-issue: Opinions and Declarations rendered by the ICZN. 1943-1955, vol.1, section A: 159-170. BHL
Re-issue: Opinions and Declarations rendered by the ICZN. 1958, vol.1, section B: 13-14. BHL

ICZN 1910: Opinion 10 (no Case registration) The designation of genotypes for genera published with identical limits, on, or before 31st December 1930. Smithsonian Institution 1910: Publication 1938.
Re-issue: Opinions and Declarations rendered by the ICZN 1943-1955, vol.1, section A: 171-178. BHL
Re-issue: Opinions and Declarations rendered by the ICZN. 1958, vol.1, section B: 15-16. BHL

ICZN 1910: Opinion 11 (no Case registration) The designation of genotypes by Latreille, 1810, Consid. gén. Crust. Arach. Ins.
Smithsonian Institution 1910: Publication 1938.
Re-issue: Opinions and Declarations rendered by the ICZN. 1943-1955, vol.1, section A: 179-190. BHL
Re-issue: Opinions and Declarations rendered by the ICZN. 1958, vol.1, section B: 17-18. BHL

ICZN 1910: Opinion 12 (no Case registration) Stephanoceros fimbriatus (Golduss, 1820) versus Stephanoceros eichhornii Ehrenberg, 1832 (Class Rotifera, Order Flosculariacea). Smithsonian Institution 1910: Publication 1938.
Re-issue: Opinions and Declarations rendered by the ICZN. 1943-1955, vol.1, section A: 191-206. BHL
Re-issue: Opinions and Declarations rendered by the ICZN. 1958, vol.1, section B: 19-21. BHL

ICZN 1910: Opinion 13 (no Case registration) The specific name of the Sand Crab.
Smithsonian Institution 1910: Publication 1938.
Re-issue: Opinions and Declarations rendered by the ICZN. 1943-1955, vol.1, section A: 207-234. BHL
Re-issue: Opinions and Declarations rendered by the ICZN. 1958, vol.1, section B: 22-24. BHL

ICZN 1910: Opinion 14 (no Case registration) The type species of Etheostoma Rafinesque, 1819 (Class Pisces, Order Percomorphi).
Smithsonian Institution 1910: Publication 1938.
Re-issue: Opinions and Declarations rendered by the ICZN. 1943-1955, vol.1, section A: 235-244. BHL
Re-issue: Opinions and Declarations rendered by the ICZN. 1958, vol.1, section B: 25-27. BHL

ICZN 1910: Opinion 15 (no Case registration) Craspedacusta sowerbii Lankester, 1880, n.g., n.sp., versus Limnocodium victoria Allman, 1880, n.g., n.sp., a fresh-water medusa (Class Hydrozoa, Order Trachymedusae).
Smithsonian Institution 1910: Publication 1938.
Re-issue: Opinions and Declarations rendered by the ICZN. 1943-1955, vol.1, section A: 245-254. BHL
Re-issue: Opinions and Declarations rendered by the ICZN. 1958, vol.1, section B: 28-30. BHL

ICZN 1910: Opinion 16 (no Case registration; 277) The status, under Rule (d) in Article 30, of a pre-binominal specific name, published prior to 1758, in relation to a generic name published on, or before, 31st December 1930.
Smithsonian Institution 1910: Publication 1938.
Re-issue: Opinions and Declarations rendered by the ICZN. 1943-1955, vol.1, section A: 255-308. BHL
Re-issue: Opinions and Declarations rendered by the ICZN. 1958, vol.1, section B: 31-39. BHL

ICZN 1910: Opinion 17 (no Case registration) Shall the genera of Weber, 1795, be accepted.
Smithsonian Institution 1910: Publication 1938.
Re-issue: Opinions and Declarations rendered by the ICZN. 1958, vol.1, section B: 40-42. BHL

ICZN 1910: Opinion 18 (no Case registration) The type of Hydrus Schneider, 1799.
Smithsonian Institution 1910: Publication 1938.
Re-issue: Opinions and Declarations rendered by the ICZN. 1958, vol.1, section B: 43-44. BHL

ICZN 1910: Opinion 19 (no Case registration) Plesiops vs. Pharopteryx. Smithsonian Institution 1910: Publication 1938.
Re-issue: Opinions and Declarations rendered by the ICZN. 1958, vol.1, section B: 45-47. BHL

ICZN 1910: Opinion 20 (no Case registration) Shall the genera of Gronow, 1763, be accepted?
Smithsonian Institution 1910: Publication 1938.
Re-issue: Opinions and Declarations rendered by the ICZN. 1958, vol.1, section B: 48-50. BHL

ICZN 1910: Opinion 21 (no Case registration) Shall the genera of Klein, 1744, reprinted by Walbaum, 1792, be accepted?
Smithsonian Institution 1910: Publication 1938.
Re-issue: Opinions and Declarations rendered by the ICZN. 1958, vol.1, section B: 51-52. BHL

ICZN 1910: Opinion 22 (no Case registration) Ceraticthys vs. Cliola.
Smithsonian Institution 1910: Publication 1938.
Re-issue: Opinions and Declarations rendered by the ICZN. 1958, vol.1, section B: 53-54. BHL

ICZN 1910: Opinion 23 (no Case registration) Aspro vs. Cheilodipterus, or Ambassis.
Smithsonian Institution 1910: Publication 1938.
Re-issue: Opinions and Declarations rendered by the ICZN. 1958, vol.1, section B: 55-56. BHL

ICZN 1910: Opinion 24 (no Case registration) Antennarius Commerson, 1798, and Duvier, 1817, vs. Histrio Fischer, 1813.
Smithsonian Institution 1910: Publication 1938.
Re-issue: Opinions and Declarations rendered by the ICZN. 1958, vol.1, section B: 57-58. BHL

ICZN 1910: Opinion 25 (no Case registration) Damesiella Tornquist, 1899, vs. Damesella Walcott, 1905.
Smithsonian Institution 1910: Publication 1938.
Re-issue: Opinions and Declarations rendered by the ICZN. 1958, vol.1, section B: 59-62. BHL

ICZN 1910: Opinion 26 (no Case registration) Cypsilurus vs. Cypselurus.
Smithsonian Institution 1910: Publication 1989.
Re-issue: Opinions and Declarations rendered by the ICZN. 1958, vol.1, section B: . BHL

ICZN 1910: Opinion 27 (no Case registration) Ruppelia and Rupellia vs. Rüppellia.
Smithsonian Institution 1910: Publication 1989.
Re-issue: Opinions and Declarations rendered by the ICZN. 1958, vol.1, section B: 65. BHL

ICZN 1910: Opinion 28 (no Case registration) Shall the Nouvelle Classification of Meigen, 1800, be given precedence over Meigen's Versuch, 1803?
Smithsonian Institution 1910: Publication 1989.
Re-issue: Opinions and Declarations rendered by the ICZN. 1958, vol.1, section B: 66-67. BHL

ICZN 1910: Opinion 29 (no Case registration) Pachynathus vs. Pachygnathus.
Smithsonian Institution 1910: Publication 1989.
Re-issue: Opinions and Declarations rendered by the ICZN. 1958, vol.1, section B: 68. BHL

ICZN 1911: Opinion 30 (no Case registration) Swainson's bird genera of 1827.
Smithsonian Institution 1911: Publication 2013.
Re-issue: Opinions and Declarations rendered by the ICZN. 1958, vol.1, section B: 69-72. BHL

ICZN 1911. Opinion 31 (no Case registration) Columbina vs. Chaemepelia.
Smithsonian Institution 1911: Publication 2013.
Re-issue: Opinions and Declarations rendered by the ICZN. 1958, vol.1, section B: 73-75. BHL

ICZN 1911. Opinion 32 (no Case registration) The type of the genus Sphex.
Smithsonian Institution 1911: Publication 2013.
Re-issue: Opinions and Declarations rendered by the ICZN. 1958, vol.1, section B: 76-77. BHL

ICZN 1911. Opinion 33 (no Case registration) The type of the genus Rutilus Rafinesque, 1820.
Smithsonian Institution 1911: Publication 2013.
Re-issue: Opinions and Declarations rendered by the ICZN. 1958, vol.1, section B: 78. BHL

ICZN 1911. Opinion 34 (no Case registration) Aeshna vs. Aeschna.
Smithsonian Institution 1911: Publication 2013.
Re-issue: Opinions and Declarations rendered by the ICZN. 1958, vol.1, section B: 79-81. BHL

ICZN 1911. Opinion 35 (no Case registration) Types of genera of binary but not binominal authors.
Smithsonian Institution 1911: Publication 2013.
Re-issue: Opinions and Declarations rendered by the ICZN. 1958, vol.1, section B: 82-83. BHL

ICZN 1911. Opinion 36 (no Case registration) Emendation of Trioxocera, Dioxocera, and Pentoxoxera.
Smithsonian Institution 1911: Publication 2013.
Re-issue: Opinions and Declarations rendered by the ICZN. 1958, vol.1, section B: 84-86. BHL

ICZN 1911. Opinion 37 (no Case registration) Shall the genera of Brisson's "Ornithologia", 1760, be accepted?
Smithsonian Institution 1911: Publication 2013.
Re-issue: Opinions and Declarations rendered by the ICZN. 1958, vol.1, section B: 87-88. BHL

ICZN 1912: Opinion 38 (no Case registration) On the status of the Latin names in Tunstall, 1771.
Smithsonian Institution 1912: Publication 2060.
Re-issue: Opinions and Declarations rendered by the ICZN. 1958, vol.1, section B: 89-90. BHL

ICZN 1912: Opinion 39 (no Case registration) On the status of the Latin names in Cuvier, 1800.
Smithsonian Institution 1912: Publication 2060.
Re-issue: Opinions and Declarations rendered by the ICZN. 1958, vol.1, section B: 91. BHL

ICZN 1912: Opinion 40 (no Case registration) Salmo eriox vs. S. Trutta and S. fario: Heniochus acuminatus vs. H. macrolepidotus.
Smithsonian Institution 1912: Publication 2060.
Re-issue: Opinions and Declarations rendered by the ICZN. 1958, vol.1, section B: 92-93. BHL

ICZN 1912: Opinion 41 (no Case registration) Athlennes vs. Ablennes.
Smithsonian Institution 1912: Publication 2060.
Re-issue: Opinions and Declarations rendered by the ICZN. 1958, vol.1, section B: . BHL

ICZN 1912: Opinion 42 (no Case registration) The type of Caropus Rafinesque, 1810.
Smithsonian Institution 1912: Publication 2060.
Re-issue: Opinions and Declarations rendered by the ICZN. 1958, vol.1, section B: 96. BHL

ICZN 1912: Opinion 43 (no Case registration) On the status of genera the type species of which are cited without additional description.
Smithsonian Institution 1912: Publication 2060.
Re-issue: Opinions and Declarations rendered by the ICZN. 1958, vol.1, section B: 97-98. BHL

ICZN 1912: Opinion 44 (no Case registration) Leptocephalus vs. Conger.
Smithsonian Institution 1912: Publication 2060.
Re-issue: Opinions and Declarations rendered by the ICZN. 1958, vol.1, section B: 99-100. BHL

ICZN 1912: Opinion 45 (no Case registration) The type of Syngnathus Linnaeus, 1758.
Smithsonian Institution 1912: Publication 2060.
Re-issue: Opinions and Declarations rendered by the ICZN. 1958, vol.1, section B: 101-103. BHL

ICZN 1912: Opinion 46 (no Case registration) Status of genera for which no species was distinctly named in the original publication.
Smithsonian Institution 1912: Publication 2060.
Re-issue: Opinions and Declarations rendered by the ICZN. 1958, vol.1, section B: 104-107. BHL

ICZN 1912: Opinion 47 (no Case registration) Carcharias, Carcharhinus and Carcharodon.
Smithsonian Institution 1912: Publication 2060.
Re-issue: Opinions and Declarations rendered by the ICZN. 1958, vol.1, section B: 108-109. BHL

ICZN 1912: Opinion 48 (no Case registration) The status of certain generic names of birds pubhshed by Brehm in Isis, 1828 and 1830.
Smithsonian Institution 1912: Publication 2060.
Re-issue: Opinions and Declarations rendered by the ICZN. 1958, vol.1, section B: 110-111. BHL

ICZN 1912: Opinion 49 (no Case registration) Siphonophora asclepiadifolii vs. Nectarophora asclepiadis.
Smithsonian Institution 1912: Publication 2060.
Re-issue: Opinions and Declarations rendered by the ICZN. 1958, vol.1, section B: 112-113. BHL

ICZN 1912: Opinion 50 (no Case registration) Aphis aquilegiae flava vs. Aphis thirhoda.
Smithsonian Institution 1912: Publication 2060.
Re-issue: Opinions and Declarations rendered by the ICZN. 1958, vol.1, section B: 114-115. BHL

ICZN 1912: Opinion 51 (no Case registration) Shall the names of Museum Calonnianum, 1797, be accepted?
Smithsonian Institution 1912: Publication 2060.
Re-issue: Opinions and Declarations rendered by the ICZN. 1958, vol.1, section B: 116-118. BHL

ICZN 1913: Opinion 52 (no Case registration) Semotilus corporalis vs. Semotilus bullaris.
Smithsonian Institution 1913: Publication 2169.
Re-issue: Opinions and Declarations rendered by the ICZN. 1958, vol.1, section B: 19-121. BHL

ICZN 1913: Opinion 53 (no Case registration) Halicampus koilomatodon vs. Halicampus grayi.
Smithsonian Institution 1913: Publication 2169.
Re-issue: Opinions and Declarations rendered by the ICZN. 1958, vol.1, section B: 12-123. BHL

ICZN 1913: Opinion 54 (no Case registration) Phoxinus Rafinesque vs. Phoxiniis Agassiz.
Smithsonian Institution 1913: Publication 2169.
Re-issue: Opinions and Declarations rendered by the ICZN. 1958, vol.1, section B: 124-125. BHL

ICZN 1913: Opinion 55 (no Case registration) The type of the genus Ondatra Link.
Smithsonian Institution 1913: Publication 2169.
Re-issue: Opinions and Declarations rendered by the ICZN. 1958, vol.1, section B: 126-127. BHL

ICZN 1913: Opinion 56 (no Case registration) The type Filaria Mueller, 1787. Smithsonian Institution 1913: Publication 2169.
Re-issue: Opinions and Declarations rendered by the ICZN. 1958, vol.1, section B: 128. BHL

ICZN 1914: Opinion 57 (no Case registration) Names dating from Hasselquist's "Iter Palaestinum", 1757, and the translation, 1762, are untenable.
Smithsonian Institution 1914: Publication 2256.
Re-issue: Opinions and Declarations rendered by the ICZN. 1958, vol.1, section B: 131-135. BHL

ICZN 1914: Opinion 58 (no Case registration) Esox, Lucius, and Belone.
Re-issue: Opinions and Declarations rendered by the ICZN. 1958, vol.1, section B: 136-139. BHL

ICZN 1914: Opinion 59 Date of Amphimerus.
Smithsonian Institution 1914: Publication 2256.
Re-issue: Opinions and Declarations rendered by the ICZN. 1958, vol.1, section B: 140-143. BHL

ICZN 1914: Opinion 60 (no Case registration) Salmo iridia vs. Sahno irideus.
Re-issue: Opinions and Declarations rendered by the ICZN. 1958, vol.1, section B: 144. BHL

ICZN 1914: Opinion 61 (no Case registration) Emendsition of Chaemepelia to Chamaepelia.
Smithsonian Institution 1914: Publication 2256.
Re-issue: Opinions and Declarations rendered by the ICZN. 1958, vol.1, section B: 145-146. BHL

ICZN 1914: Opinion 62 (no Case registration) Type species of other genera are not excluded from consideration in the selection of the type of a genus.
Smithsonian Institution 1914: Publication 2256.
Re-issue: Opinions and Declarations rendered by the ICZN. 1958, vol.1, section B: 147-149. BHL

ICZN 1914: Opinion 63 (no Case registration) Leuciscus hakuensis vs. Leuciscus hakonensis.
Re-issue: Opinions and Declarations rendered by the ICZN. 1958, vol.1, section B: 150. BHL

ICZN 1914: Opinion 64 (no Case registration) Serial letters as a, b, c, etc., are not acceptable as specific names.
Smithsonian Institution 1914: Publication 2256.
Re-issue: Opinions and Declarations rendered by the ICZN. 1958, vol.1, section B: 151. BHL

ICZN 1914: Opinion 65 (no Case registration) Case of a genus based upon erroneously determined species.
Smithsonian Institution 1914: Publication 2256.
Re-issue: Opinions and Declarations rendered by the ICZN. 1958, vol.1, section B: 152-170. BHL

ICZN 1915: Opinion 66 (no Case registration) Nematode and Gordiacea names placed in the Official List of Generic Names.
Smithsonian Institution 1915: Publication 2359.
Re-issue: Opinions and Declarations rendered by the ICZN. 1958, vol.1, section B: 171-176. BIOSTOR BHL

ICZN 1916: Opinion 67 (no Case registration) One hundred and two bird names placed in the Official List of Generic Names.
Smithsonian Institution 2016: Publication 2409.
Re-issue: Opinions and Declarations rendered by the ICZN. 1958, vol.1, section B: 177-182. BIOSTOR BHL

ICZN 1922: Opinion 68 (no Case registration) The type species of Pleuronectes Linnaeus, 1758A.
Smithsonian Miscellaneous Collections, 73(1): 1-8. PDF
Re-issue: Opinions and Declarations rendered by the ICZN. 1958, vol.1, section B: 185-192. BHL

ICZN 1922: Opinion 69 (no Case registration) The type species of Sparus Linnaeus, 1758.
Smithsonian Miscellaneous Collections, 73(1): 9-12. PDF
Re-issue: Opinions and Declarations rendered by the ICZN. 1958, vol.1, section B: 193-196. BHL

ICZN 1922: Opinion 70 (no Case registration) The case of Libellula americana L., 1758, vs. Libellula americanus Drury, 1773.
Smithsonian Miscellaneous Collections, 73(1): 13-15. PDF
Re-issue: Opinions and Declarations rendered by the ICZN. 1958, vol.1, section B: 197-199. BHL

ICZN 1922: Opinion 71 (no Case registration) Interpretation of the expression "typical species" in Westwood's (1840) Synopsis.
Smithsonian Miscellaneous Collections, 73(1): 16-18. PDF
Re-issue: Opinions and Declarations rendered by the ICZN. 1958, vol.1, section B: 200-202. BHL

ICZN 1922: Opinion 72 (no Case registration) Herrera's zoological formulae.
Smithsonian Miscellaneous Collections, 73(1): 19-22. PDF
Re-issue: Opinions and Declarations rendered by the ICZN. 1958, vol.1, section B: 203-206. BHL

ICZN 1922: Opinion 73 (no Case registration) Five generic names in Crinoidea, eighty-six generic names in Crustacea, and eight generic names in Acarina, placed in the Official List of Generic Names.
Smithsonian Miscellaneous Collections, 73(1): 23-31. 1922 BIOSTOR BHL
Re-issue: Opinions and Declarations rendered by the ICZN. 1958, vol.1, section B: 207-215. BHL

ICZN 1922: Opinion 74 (no Case registration) Apstein's (1915) List of Nomina Conservanda.
Smithsonian Miscellaneous Collections, 73(1): 32-34. PDF
Re-issue: Opinions and Declarations rendered by the ICZN. 1958, vol.1, section B: 216-220. BHL

ICZN 1922: Opinion 75 (no Case registration) Twenty-seven generic names of Protozoa, Vermes, Pisces, Reptilia and Mammalia included in the Official List of Zoological Names.
Smithsonian Miscellaneous Collections, 73(1): 35-37. 1922 BIOSTOR BHL
Re-issue: Opinions and Declarations rendered by the ICZN. 1958, vol.1, section B: 221. BHL

ICZN 1922: Opinion 76 (no Case registration) Status of Pyrosoma vs. Monophora; Cyclosalpa vs. Holothuria; Salpa vs. Dagysa; Doliolum, Appendicularia and Fritillaria.
Smithsonian Miscellaneous Collections, 73(1): 38-70. PDF
Re-issue: Opinions and Declarations rendered by the ICZN. 1958, vol.1, section B: 222-254. BHL

ICZN 1922: Opinion 77 (no Case registration) Thirty-five generic names in Protozoa, Coelenterata, Trematoda, Cestoda, Cirripedia, Tunicata, and Pisces placed in the Official List of Generic Names.
Smithsonian Miscellaneous Collections, 73(1): 71-73. 1922 BIOSTOR BHL
Re-issue: Opinions and Declarations rendered by the ICZN. 1958, vol.1, section B: 255-260. BHL

ICZN 1924: Opinion 78 (no Case registration) Case of Dermacentor andersoni vs. Dermacentor venustus.
Smithsonian Miscellaneous Collections, 73(2): 1-14. PDF
Re-issue: Opinions and Declarations rendered by the ICZN. 1958, vol.1, section B: 261-274. BHL

ICZN 1924: Opinion 79 (no Case registration) Case of Lamarck's (1801A) Système des animaux sans vertèbres.
Smithsonian Miscellaneous Collections, 73(2): 15-17. PDF
Re-issue: Opinions and Declarations rendered by the ICZN. 1958, vol.1, section B: 275-276. BHL

ICZN 1924: Opinion 80 (no Case registration) Suspension of rules in the case of Holothuria and Physalia.
Smithsonian Miscellaneous Collections, 73(2): 17-18. 1924 BIOSTOR BHL
Re-issue: Opinions and Declarations rendered by the ICZN. 1958, vol.1, section B: . BHL

ICZN 1924: Opinion 81 (no Case registration) The genotype of Cimex, Acanthia, Clinocoris, and Klinophilos.
Smithsonian Miscellaneous Collections, 73(2): 19-32. PDF
Re-issue: Opinions and Declarations rendered by the ICZN. 1958, vol.1, section B: 279-294. BHL

ICZN 1925: Opinion 82 (no Case registration) Suspension of rules for Musca Linnaeus, 1758A, type M. domestica.
Smithsonian Miscellaneous Collections, 73(3): 1-7. 1925 BIOSTOR BHL
Re-issue: Opinions and Declarations rendered by the ICZN. 1958, vol.1, section B: 295-301. BHL

ICZN 1925: Opinion 83 (no Case registration) Acanthiza pyrrhopyga Vigors and Horsfield, 1827, vesus Acanthiza pyrrhokyga Gould, 1848.
Smithsonian Miscellaneous Collections, 73(3): 8-10. 1925 BHL
Re-issue: Opinions and Declarations rendered by the ICZN. 1958, vol.1, section B: 305-306. BHL

ICZN 1925: Opinion 84 (no Case registration) Trematode, Cestode, and Acanthocephala names placed in the Official List of Generic Names.
Smithsonian Miscellaneous Collections, 73(3): 11-12. 1925 BIOSTOR BHL
Re-issue: Opinions and Declarations rendered by the ICZN. 1958, vol.1, section B: 305-306. BHL

ICZN 1925: Opinion 85 (no Case registration) Ninety-eight generic names in Crustacea placed in the Official List of Generic Names.
Smithsonian Miscellaneous Collections, 73(3): 13-18. 1925 BIOSTOR BHL
Re-issue: Opinions and Declarations rendered by the ICZN. 1958, vol.1, section B: 307-312. BHL

ICZN 1925: Opinion 86 (no Case registration) Conulunus von Martens, 1895.
Smithsonian Miscellaneous Collections, 73(3): 19-20. PDF
Re-issue: Opinions and Declarations rendered by the ICZN. 1958, vol.1, section B: 313-314. BHL

ICZN 1925: Opinion 87 (no Case registration) The status of proof-sheets in nomenclature.
Smithsonian Miscellaneous Collections, 73(3): 21-22. PDF
Re-issue: Opinions and Declarations rendered by the ICZN. 1958, vol.1, section B: 315-316. BHL

ICZN 1925: Opinion 88 (no Case registration) Otarion diffractum vs. Cyphaspis burmeisteri.
Smithsonian Miscellaneous Collections, 73(3): 23-26. 1925 BIOSTOR BHL
Re-issue: Opinions and Declarations rendered by the ICZN. 1958, vol.1, section B: 317-320. BHL

ICZN 1925: Opinion 89 (no Case registration) Suspension of the Rules in the case of Gronow 1763, Commerson 1803, Gesellschaft Schauplatz I775 to I781, Catesby 1771, Browne 1789, Valmont de Bomare 1768 to 1775.
Smithsonian Miscellaneous Collections, 73(3): 27-33. PDF
Re-issue: Opinions and Declarations rendered by the ICZN. 1958, vol.1, section B: 321-327. BHL

ICZN 1925: Opinion 90 (no Case registration) Report on sixteen generic names of mammals for which suspension of Rules was requested.
Smithsonian Miscellaneous Collections, 73(3): 34-40. PDF
Re-issue: Opinions and Declarations rendered by the ICZN. 1958, vol.1, section B: 328-336. BHL

ICZN 1926: Opinion 91 (no Case registration) Thirty-five generic names of mammals placed on the Official List of Generic Names.
Smithsonian Miscellaneous Collections, 73(4): 1-2. 1926 BIOSTOR BHL
Re-issue: Opinions and Declarations rendered by the ICZN. 1958, vol.1, section B: 337-338. BHL

ICZN 1926: Opinion 92 (no Case registration) Sixteen generic names of Pisces, Amphibia, and Reptilia placed in the Official List of Generic Names.
Smithsonian Miscellaneous Collections, 73(4): 3-4. 1926 BIOSTOR BHL
Re-issue: Opinions and Declarations rendered by the ICZN. 1958, vol.1, section B: 339-340. BHL

ICZN 1926: Opinion 93 (no Case registration) Twelve generic names of fishes placed in the Official List, by suspension of the rules.
Smithsonian Miscellaneous Collections, 73(4): 5-11. 1926 BIOSTOR BHL
Re-issue: Opinions and Declarations rendered by the ICZN. 1958, vol.1, section B: 341-347. BHL

ICZN 1926: Opinion 94 (no Case registration) Twenty-two mollusk and tunicate names placed in the Official List of Generic Names.
Smithsonian Miscellaneous Collections, 73(4): 12-13. 1926 BIOSTOR BHL
Re-issue: Opinions and Declarations rendered by the ICZN. 1958, vol.1, section B: 348-349. BHL
Correction: Direction 117. Correction of entry No. 462 in the Official List of Generic Names in Zoology concerning sphaerium Scopoli, 1777 (Mollusca, Bivlavia) (correction to Opinion 94). Bulletin of Zoological Nomenclature, 42( 1): 43- 45. 1985 http://biostor.org/reference/2871 http://biodiversitylibrary.org/page/12228940

ICZN 1926: Opinion 95 (no Case registration) Two generic names of Protozoa placed in the Official List of Generic Names.
Smithsonian Miscellaneous Collections, 73(4): 14-15. 1926 BIOSTOR BHL
Re-issue: Opinions and Declarations rendered by the ICZN. 1958, vol.1, section B: 350-351. BHL

ICZN 1926: Opinion 96 (no Case registration) Museum Boltenianum.
Smithsonian Miscellaneous Collections, 73(4): 16-18. PDF
Re-issue: Opinions and Declarations rendered by the ICZN. 1958, vol.1, section B: 352-354. BHL

ICZN 1926: Opinion 97 (no Case registration) Did Hübner's Tentamen, 1806, create monotypic genera?
Smithsonian Miscellaneous Collections, 73(4): 19-30. PDF
Re-issue: Opinions and Declarations rendered by the ICZN. 1958, vol.1, section B: 355-368. BHL

ICZN 1928: Opinion 98 (no Case registration) Brauer and Bergenstamm.
Smithsonian Miscellaneous Collections, 73(5): 1-3. PDF
Re-issue: Opinions and Declarations rendered by the ICZN. 1958, vol.1, section B: 369-371. BHL

ICZN 1928: Opinion 99 (no Case registration) Endamoeba Liany, 1879, vs. Entamoeba Casagrandi and Barbagallo, 1895.
Smithsonian Miscellaneous Collections, 73(5): 4-8. PDF
Re-issue: Opinions and Declarations rendered by the ICZN. 1958, vol.1, section B: 372-375. BHL

ICZN 1928: Opinion 100 (no Case registration) Suspension of rules, Spirifer and Syringothyris.
Smithsonian Miscellaneous Collections, 73(5): 9-12. 1928 BIOSTOR BHL
Re-issue: Opinions and Declarations rendered by the ICZN. 1958, vol.1, section B: 377-380. BHL