58 U.S. NATIONAL MUSEUM BULLETIN 260 



Euonyx f'lrlot'i Slieard (1938) has a shorter article 5 of gnathopod 

 1 than does E. laqueus^ a rounded posteroventral corner on pleonal 

 epimeron 3, and bears dark eyes. Gnathopod 2 of E. firloti has a 

 poorly defined palm and short dactyl. 



Euonyx conicurus K. H. Barnard (1925) has a large, erectly acute 

 process on urosomite 1 and a poorly developed palm of gnathopod 2. 



Eyes are represented on some specimens of E. laqueus by a faint 

 pink, L-shaped stain as shown on one of the figures. No specimens 

 are ovigerous but some have rudimentary brood plates. Gills are com- 

 plex and some bear accessory appendages but their condition is highly 

 variable owing to preservational shrinkage and length of time in the 

 instars; on some specimens the gills are enormously swollen, opaque 

 and turgid and on others the gills are but thin shells of what they 

 must have been in life. 



Orchoniene Boeck, new synonymy 



OrcJiomene Boeck, 1871, p. 114 [Type-species : Anonyx serratus Boeck, 1861 

 (selected by Boeck, 1876) ]. 



Tryphosa Boeck, 1871, p. 117 [Type-species: Anonyx nanus Kr^yer, 1846 (se- 

 lected by Boeck, 1876) ]. 



Orcliomcnella Sars, 1895, p. 66 [Type-species: Anonyx mlnutus Kr0yer, 1846 

 (original designation) ]. 



Orchomenopsis Sars, 1895, p. 73 [Type-species : Orchomenopsis obtusa Sars, 1895 

 (monotype)]. 



The type-species of Tryijhosa and Orcliomenella are undoubtedly 

 congeneric; the confusion arose when Sars (1895) misidentified 

 Anonyx nanus and erected, for his material, the new name Orclio- 

 menella ciliata. The material he named Anonyx namis was, in reality, 

 a new species, named Tryphosella sarsi by Bonnier (1893), and later 

 transferred to Tryphosa by Stebbing (1906). Stebbing failed to note 

 that Tryphosa and Orchomenella were, therefore, synonymous since 

 Anonyx nanus Kr0yer and A. minutus Ivr0yer are congeneric. Be- 

 cause the type-species of Orchomenella was correctly identified by Sars 

 there can be no application of article 70a of the ICZN code. 



Even though Boeck had erected Tryphosa in 1871 and later desig- 

 nated its type as A. nanus ^ the concept of the genus has stemmed from 

 Sars' diagnosis, followed by Stebbing (190G), and essentially based on 

 what came to be called Tryphosa sarsi (Bonnier) . The large group of 

 species, known since 1906 under the name of '■'■Tryphosa''' as congeners 

 of T. sarsi must, therefore, be accorded another generic name. The 

 next available name is Tryphosella Bonnier, a genus that came to be 

 characterized according to its only residual species, Tryphosa har- 

 hatipes Stebbing (1888), for Stebbing (1906) removed all other spe- 

 cies Bonnier had assigned to it. This violated Bonnier's intent for he 



