4(>0 CALIFORNIA ACADEMY OF SCIENCES. 



the dorsal fin; 7-!> a/ygous plates in front of the adipose 

 fin. In the young the margin and in the adult the sur- 

 face of the liimimo also with minute bristles. 



Coracoid processes in the ? diverging backward; in 

 the <3 their margins free, sometimes overlapping on the 

 breast and belly. Behind the pectoral fin. the coracoid 

 and humeral processes are depressed. Distance of the 

 dorsal spine from the snout 24-2.1 in the length; the 

 dorsal spine short, broad and flat, hispid in front, about 

 3 in the head, the fin rounded, about as high as long. 

 The spine of the adipose fin. higher than that of the dor- 

 sal, not flattened, thickly hispid. 



Caudal truncate, 3J--4J- in the length. 



Anal obliquely rounded, much higher than long. 



Ventrals 1-li in the head. 



Pectoral spine, in the ? , 5^ in the length, its inner 

 margin finely pectinate, its outer surface setiferous; in 

 the <$ 2f-3| in the length. 



Olivaceous, irregularly marked with darker; sometimes 

 everywhere with small round brown spots; sometimes 

 with broad bands across the back and marblings below; 

 ventral surface usually lighter and spotted with dark 

 brown; dorsal fins spotted with brown, usually the mar- 

 gin and anterior rays nearly black; caudal spotted with 

 brown, a broad median and narrower basal and marginal 

 cross bars of dark brown, sometimes irregularly spotted; 

 other fins spotted with brown, sometimes with a median 

 cross band; the old more uniform in color. 



Head 3J-4; depth 3i-4J; D. I, 7-8; A. I, 5-7; V. 6; 

 Lat. pi. |-f. 



Over one hundred and twenty-five specimens .03- 

 .225 m. 



Silva, Lake Saraca; Curupira; Tabatinga; Cudajas; 

 Gurupa; Teffe; Lake Hyaiiuary; Villa Bella; Para; Uer- 

 anduba; Santarem; Porto do Moz; Pernambuco; Obidos. 



