276 BULLETIN 189, UNITED STATES NATIONAL MUSEUM 



pectoral moderate, reaching somewhat beyond tip of ventral, the fifth 

 or sixth ray (comiting downward) longest, 1.2 to 1.4 in head, 4.1 to 

 4.5 in length. 



Color grayish brown, with metallic reflection above; silvery below; 

 an indefinite dark area on upper part of opercle; most of body with 

 dusky punctulations, these extending on all the fins, exclusive of the 

 ventrals; axil of pectoral dusky. 



This species is represented in the collection, furnished by the 

 Mission, by six specimens, 85 to 235 mm. (66 to 191 mm. to base of 

 caudal) long, taken with an otter trawl in the Gulf of Guayaquil off 

 Puerto Pizarro. These specimens have been identified as C. altipinnis, 

 originally described from the " Westkiiste von Siidamerika" by Stein- 

 dachner. The name altipinnis has been placed in the synonymy of 

 C. analis by several authors. However, there certainly are two species 

 with long anal fins in the Peruvian collections. The number of anal 

 rays, given as II, 17 in Steindachner's original description, offers the 

 chief reason for recognizing C. altipinnis as valid and indentifying with 

 it the six specimens herein described. Other differences are shown 

 in the parallel comparisons offered. Steindachner's figure (head only) 

 of the type, which was 7 inches (175 mm.) long, shows spines on the 

 anterior ridge of the preopercle. These are evident on the smaller 

 specimens of both species, and although not visible in the larger speci- 

 mens, they remain, but are hidden in the skin. The presence of these 

 spines, therefore, does not constitute a distinguishing character, as 

 Abbott (1899, p. 353) believed. The characters distinguishing the 

 two species are tabulated below: 



C. analis 



Soft rays of anal, uniformly 15 in 13 

 specimens. 



Dorsal spines in adults, 9 in 13 speci- 

 mens, 10 in 1. 



Soft rays of dorsal, 22 in 1 specimen, 

 23 in"l2. 



Base of anal 13 to 18 percent of length; 

 origin of anal slightly anterior to 

 middle of base of soft dorsal. 



Caudal fin with concave margin, the 

 middle rays shortest in adult; fin 

 nearly square in small specimens. 



C. altipinnis 



Soft rays of anal, 17 in 2 specimens, 18 

 in 3, and 19 in 1. 



Dorsal spines in adults 7 in 2 specimens, 

 8 in 2; in young 9 in 1 and 10 in 1 

 (the last 2 spines apparently dis- 

 appearing with age). 



Soft rays of dorsal, 22 in 4 specimens, 

 23 in 2. 



Base of anal 20 to 25 percent of length; 

 origin of anal nearly under beginning 

 of second fourth of soft dorsal. 



Caudal fin more or less double concave, 

 the middle rays longest in adult; fin 

 apparently rounded in young. 



Range. — Originally recorded from "West coast of South America," 

 now for the first time definitely recorded from northern Peru. Prob- 

 ably not numerous. 



