236 CALIFORNIA ACADEMY OF SCIENCES. 



sides, those above the first anal ray highest, If in the 

 head, those on tlie caudal peduncle meeting the scutes 

 of the other side above and below; each lateral scute 

 posterior to the dorsal plate has a median hook and 

 5-14 smaller spines above and below it. 



Basal half of the caudal rays with about 5 series of 

 small spines. 



Distance of the dorsal fin from the snout 2^ in the 

 length; dorsal spine 1| in the length of the head, its 

 posterior margin smooth, its sides and anterior margin 

 with many short spines, a smooth groove between the 

 spines of the sides and front margin. Distance between 

 dorsal and adipose fins 3| in the length; adipose fin 

 oval, as long as the dorsal fin without the spine. 



Caudal rounded, 2 in the head. 



Anal rounded, the central rays highest, as high as the 

 length of the caudal. 



Ventrals not reaching the anal, 2 in the head. 



Pectoral spine strong, not reaching the ventral fins; 

 its lower surface bluntly granular, its upper with short 

 teeth like those on the humeral process, both margins 

 finely serrate. 



Brown marked with white; a white lateral band not 

 as wide as the eye; a median series of white spots on the 

 back; ventral surface and sides of the head irregularly 

 spotted with white; top of the head with a median, in- 

 terrupted light band; dorsal, pectoral and ventral fins 

 spotted and marbled with brown and white; posterior 

 margin of the adipose white; caudal and anal fins with 

 undulating cross bars of white and brown. Barbels an- 

 nulated with brown and white. 



HeadSf; depthS; Lat. I. 26; D.I, 5; A. 12; V. 6; P. I, 6. 



One specimen .15 m. Coary. Professor L. Agassiz. 



