1886.] NATURAL SCIENCES Of PHILADELPHIA. 257 



6. Premaxillary groove naked. 

 c. Anal rays II, 8 ; body very elongate, its depth 3f in its 

 length ; eye 2f in head. Lefroyi. 1. 



cc. Anal rays III, 7. 

 d. Premaxillary groove narrow, linear. 

 e. Eye very large, its diameter much greater than length of 

 snout, 2 in length of head. Exposed portion of 

 maxillary small, triangular. Dowi. 2. 



ee. Eye small, more than 3 in head, its diameter about equal 

 to length of snout. Exposed portion of maxillary 

 triangular in front, oblong behind. 

 /. Body elongate, the back little elevated ; greatest depth 

 3j to 3^ in length. Anal spines small, the second 4^ 

 in length of head. Pseudogula. 3. 



ff. Bod}' more compressed, deeper, the back more elevated ; 

 greatest depth 2f in length. Anal spines larger, the 

 second 3^ in length of head. Gracilis. 4. 



dd. Premaxillary groove broad, oval, naked. Body elevated, 

 compressed, its greatest depth 2| in its length. 

 g. Caudal fin shorter than head, sides without dark ver- 

 tical bars. Second anal spine short, 3 to 4 in head ; 

 ventrals short, little more than half the length of 

 head, their tips not reaching vent; dark punctula- 

 tions on body few or none ; upper part of spinous 

 dorsal becoming gi-adually blackish ; other fins 

 nearly plain ; axil faintly dusky. Californiensis. 5. 

 gg. Caudal fin longer than head. Sides with 7 to 9 dark 

 bluish vertical bars, about as broad as pupil. Anal 

 spines longer, the second 2f in length of head. 

 Ventrals longer, 1| in length of head, scarcel}' 

 reaching vent. Ginereus. 6. 



bb. Premaxillary groove scaled in front, forming a naked pit 

 behind. Depth 2| in length ; head 3 to B^ in length of 

 body. Second anal spine about 3^ in head. Gula. 7. 



aa. Preopercle distinctly entire. 

 h. Preorbital entire ; body without distinct dark streaks along 

 the rows of scales. {Moharra Poej'-). 

 i. Premaxillary groove broad, triangular or oval, and free from 

 scales. 



