144 CALIFORNIA ACADEMY OF fcCIENCES. 



four ridges which are obscurely granular, the inner two 

 bordering the fontanel, the outer ridges curved in fronts 

 extending obliquely backward from near posterior nasal 

 openings; occipital process as long as broad, its margins 

 concave; fontanel continued as a deep groove to base of 

 occipital process; opercle faintly striate; humeral process, 

 entirely covered with thick skin, not granular. 



Eye lateral, but well above angle of mouth, its diameter 

 11 in snout, 6 in head, 3 in interocular. Snout depressed, 

 rounded in front. 



Maxillary barbels extending scarcely beyond base of 

 pectorals; mentals not reaching gill-opening. 



Upper jaw little projecting; width of mouth 25 in head- 

 Intermaxillary teeth long and slender, the depth of the 

 band 4| in its width; vomerine and palatine teeth obtusely 

 conical, the vomerine patches separate, contiguous to, but 

 not confluent with the palatine patches. 



Gill-membranes not forming an angle where they meet,, 

 with a rather broad, free margin. Gill-rakers short and 

 thick, 4-1-5. 



Pectoral pore small; vertical series of pores on the sides. 



Distance of dorsal fin from snout 2g in the length, the 

 spine 1| in head, its outer margin with granular teeth near 

 its base, its inner margin with short teeth. Distance of 

 adipose fin from the dorsal, SJ in the lengtli. Adipose fin 

 much longer than high, as long as the dorsal fin. 



Caudal fin forked, the upper lobe one-third longer than 

 the lower, very nearly as long as the head, 85 in the length. 



Anal fin emarginate, scarcely longer than high, its height 

 2J in the head. 



Ventrals reaching almost to the anal, about 2 in head. 



Pectoral spine a little longer than the dorsal spine. If in 

 the head; its outer edge roughened, inner edge with rather 

 sharp teeth. 



Color: brown above, sides silverv; entire under surface 



