260 CALIFORNIA ACADEMY OF SCIENCES. 



Lateral scutes low, highest above the anal, their height 

 about h orbital diameter, gradually becoming smaller 

 each way, scarcely evident anterior to the tips of the 

 ventrals, but showing as minute imbedded ossicles ex- 

 tending forward to a subdermal process which extends 

 downward from the posterior angle of the dorsal plate 

 to the posterior end of the humeral process. Each scute 

 with a median hook. 



Distance of the dorsal fin from the snout 23--2| in the 

 length; dorsal spine Is-li in the head, serrate on both 

 margins, less coarsely on the inner, the sides striate. 

 Interdorsal space about 4 in the length; the adipose fin 

 free posteriorly, its base about equal to that of the 

 dorsal fin exclusive of the spine. 



Caudal fin forked, its rays leathery; accessory rays 10' 

 or 11, the last forming a small plate above and below on 

 the caudal peduncle, the longest rays IJ-l^ in the head. 



Anal somewhat leathery, slightly emarginate, its 

 highest ray 2-2| in the head. 



Ventrals not reaching the anal, about 2 in the head. 



Pectoral spine strong, serrate on both margins, most 

 coarsely on the inner; sides striate. 



Small pores in the axil and beneath lower margin of 

 the humeral process making the skin sieve-like. 



Humeral process broad and strong, reaching the pos- 

 terior third of the pectoral spine, its surface striate. One 

 or two thin plates imbedded in the skin above the 

 humeral process. 



Light purple above, becoming plain light below; dor- 

 sal fin dusky at tip, the pectorals and caudal with very 

 minute dots; ventrals and anal plain light colored. A 

 ihin place in the skin above the humeral process, the 

 "tympanum" in an example .14 m. long is narrowly 

 margined with yellow giving the appearance of an ocellus 

 slightly larger than the pupil. 



