1883.] NATURAL SCIENCES OF PHILADELPHIA. Ill 



(Id. Premaxillary groove not linear. 



e. Bod}' slender, depth 3 to 3^ in length, jonesi. 4. 

 ee. Body somewhat elevated, depth about 2^ in length. 

 /. Caudal fin moderate, shorter than head ; second 

 anal spine not very strong, shorter than 

 third, J to ^ length of head ; ventrals short, 

 little more than half length of head, not 

 reaching vent. Color bright silvery, darker 

 above ; snout and upper edge of caudal 

 peduncle somewhat dusky; dark punctula- 

 tions on body few or none ; no trace of 

 vertical bars ; upper part of spinous dorsal 

 becoming gradually blackish, other fins 

 nearly plain ; axil faintly dusk3\ 



californiensis. 5. 

 ff. Caudal fin about as long as head ; second anal 

 spine very strong, longer than third, one- 

 third or more length of head ; ventrals long, 

 two-thirds length of head, reaching vent. 

 Color in life, clear silvery, bluish above, 

 sides with obsolete longitudinal streaks ; 

 back and sides with 8 or 9 bluish vertical 

 bars, about as broad as the pupil ; a dark 

 blotch on upper edge of eye. cinereux. 6. 

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

 behind ; depth about 2| in length. gula. 1. 



aa. Preopercle serrate ; premaxillary groove broad. 

 b. Preorbital entire. 



c. Premaxillary groove naked. 



d. Body ovate, the outline somewhat regularly elliptical, 



depth a little less than half length; spines rather 



slender and short, second dorsal spine half length 



of head, second anal spine less than half length 



^ of head. aureolus. 8. 



dd. Bod}^ rhomboid, short and deep, with angular outlines, 



the deptii usually more than half length; spines 



long and strong. 



e. Anal rays III-8; second dorsal spine three-fourths 



or more length of head ; second anal spine more 



than half length of head. peruviaiws. 9. 



