72 CALIFORNIA ACADEMY OF SCIENCES. 



Width of body equal to its depth; profile not very 

 steep; the head flattish above, its greatest depth little 

 less than its greatest width, which is equal to three- 

 fourths the length of the head. Top of head finely 

 granulated, the granules irregularly scattered, more or 

 less concealed in the skin. Occipital process strongly 

 keeled, longer than broad. Fontanel abruptly continued 

 as a narrow, deep groove to the base of the occipital 

 process; opercle smooth, with mucous canals. 



Eye large, its vertical diameter I3-II in its longitudi- 

 nal diameter, which is 2 in snout, 6 in head, 2 in the 

 interorbital, 3 in the interocular. 



Maxillary barbels reaching beyond base of pectoral or 

 shorter; post mentals to base of pectoral or shorter; 

 mentals about to edge of gill-membrane. 



Snout bluntish, decurved; upper jaw slightly project- 

 ing; teeth in the jaws small, villiform, those on the 

 palate conical, the vomerine band joined 

 to the triangular palatine patches, the inner 

 margins of which are close together and 

 nearly parallel, the form of the patches 

 variable. Distance between the palatine 

 patches equal to the diameterof the pupil. 



Gill-membranes united, forming a broad 

 margin across the isthmus. Gill-rakers 6+10. 



Body with vertical series of pores; pectoral pore mod- 

 erate. 



Distance of dorsal fin from snout 2|-2-| in the length, 

 the spine slender, I3-II in head, its margins with 

 rather sharp, short teeth; distance of the adipose fin 

 from the dorsal S^-Sf in the length; adipose fin as high 

 as long, scarcely more than half as long as the dorsal fin, 

 its posterior margin free. 



Caudal 3^-3 in the length. 



Anal scarcely longer than high, deeply emarginate. 



