1918.] NATUEAL SCIENCES OF PHILADELPHIA. 341 



NEW GENERA OF FISHES. 

 BY DAVID STARR JORDAN. 



In the preparation of a catalogue of the generic names which 

 have been apphed to fishes, the writer has noted a number of vaHd 

 genera and subgenera, which have either received no name or are 

 recorded under a name ah'eady preoccupied. Some of these form 

 the subject of the present paper. 



AORIA Jordan. 



Type: Bagrus lamarrii Cuv. & Val. 



A substitute for Macrones Dumeril, preoccupied by Macrones 

 Newman, 1841, a genus of Coleoptera. 



AZURELLA Jordan. 



■Type: Pomacentrus bairdi Gill, Microspathodon bairdi Jordan. 



This genus resembles Microspathodon Giinther, with which it 

 agrees in the peculiar dentition (uniserial, movable teeth) and in 

 general structure, differing in having the vertical fins not elevated 

 and the caudal simply limate. The nostril in Azurella bairdi is 

 much larger than in Microspathodon dorsalis, which species we infer 

 is congeneric with M. chrysurus (Cuv. & Val.), the little-known type 

 of the genus. The genus Stegastes Jenyns {S. iinbricatus) (1842) is 

 probably identical with Microspathodon (Giinther, 1862) and of ear- 

 lier date. This matter demands further investigation. 



COTYLICHTHYS Jordan. 



Type: C otylis fimbriata MxiWev &,Tvo^che[. 



The genus Cotylis, as first indicated by Miiller (Wiegmann's 

 Archiv., 1843, p. 297), contains but a single species, Cotylis nudus 

 M. &. T. = Lepadogaster nudus Bl. & Schn. = Gobiesox gyrinus 

 Jordan & Evermann, 1896 (not Cyclotperus nudus L., a species as 

 yet unrecognized). Cotylii M. & T. {nudus = gyrinus) is a synonym 

 of Gobiesox Lacepede; fimbriata therefore requires a new name, as 

 above. 



EPERLANIO Jordan. 



Type: Osmerus albatrossis Jordan and Gilbert, the 'Tvadiak 

 Smelt". 



This genus or subgenus differs from Osmerus in the very long anal 

 fin of twenty ra3^s. The teeth are much weaker than in Osmerus, 



