NO. lO FISHES FROM PERU IIILDEBRAND AND BARTON II 



it does from nematopiis, but it agrees in the depth of the body and 

 more or less in the length of the head. These and other differences 

 are shown in the parallel comparison. The validity of this species, 

 that is, its distinctness from ncmatopus, has been questioned by 

 Norman (1937, p. 56). In view of the present study it seems ad- 

 visable to retain nematopiis and longipes as distinct species. Garman 

 (1899, p. 189) stated that longipes differs from nematopus in having 

 a greater number of dorsal rays and a smaller number of ventral rays. 

 All specimens of 4 species examined have uniformly 6 ventral rays, 

 and the difference in the number of dorsal rays is at most very small, 

 and instead of being more numerous, they actually are slightly fewer 

 according to the specimens examined. 



The only other .species of this genus reported from off the Pacific 

 coast of tropical America, rastrelliger, of which several "type" speci- 

 mens are at hand (U.S.N.M. No. 44281), differs from all the others of 

 that region in having more gill rakers, 18 to 20 being present on the 

 lower limb of the first arch. 



nematopus 

 Pectoral rays 20 to 23. 



longipes 

 Pectoral rays 20 and 21. 



Dorsal rays 10-56 to 59. Dorsal rays ii-54- 



Scales in lateral series 

 86 to about 100, and 

 6 longitudinal rows 

 between lateral line 

 and middle of first 

 dorsal. 



Ventral fin longer than 

 head, 3.0 to 3-55 in 

 standard length. 



Head moderate, its 

 length 3.9 to 4.0 in 

 standard length. 



Depth 5.1 to 525 in 

 standard length. 



Eye 3.4 to 4.1 in head. 



Gill rakers blunt, not 

 definitely expanded at 

 tips, quite spiny, nearly 

 as long as pupil. 



Scales in lateral series 

 lost in part, about 76, 

 and 6 longitudinal rows 

 between lateral line 

 and middle of first 

 dorsal. 



Ventral fin longer than 

 head, 3.3 in standard 

 length. 



Head large, its length 

 3.5 in standard length. 



Depth 4.7 in standard 

 length. 



Eye 4.65 in head. 



Gill rakers pointed, not 

 expanded at tips, not 

 very spiny, nearly as 

 long as pupil. 



talarae, new species 

 Pectoral rays 26 and 27. 



Dorsal rays 10-60. 



Scales in lateral series 

 lost in part, about no, 

 and 8 longitudinal 

 rows between lateral 

 line and middle of first 

 dorsal. 



Ventral fin shorter than 

 head, 5.3 in standard 

 length. 



Head moderate, its 

 length 3.8 in standard 

 length. 



Depth 4.6 in standard 

 length. 



Eye 4.4 in head. 



Gill rakers broad, 

 greatly expanded at 

 tips, very spiny, 

 scarcely half length of 

 pupil. 



