450 BULLETIN 189, UNITED STATES NATIONAL MUSEUM 



When Steindachner described P. duhius he considered it doubtfully 

 distinct from P. jurcirhinus Garman (1899, p. 51). However, 

 Garman's specimens, taken in deep water in Panama Bay, according 

 to his description and figure, differ in several respects from the speci- 

 men from Peru, which agrees well with Steindachner's description 

 and figure. The body in duhius is more elongate (depth 2.7 in length 

 in figure of Jurcirhinus) ; the eye is shorter than snout, whereas it 

 is longer than snout in jurcirhinus; the maxillary does not reach 

 vertical from posterior margin of eye, but reaches a little beyond 

 this point m jurcirhinus . However, the most pronounced difference, 

 if Garman's figure is correct, is in the position of the ventral fins, 

 which is not stated in his description. In duhius these fins are in- 

 serted a little in advance of the pectoral fins, but shown as well 

 behind the base of the pectorals m jurcirhinus. 



Range. — Known only from Paita, Peru. 



Genus SEBASTODES Gill, 1861 



Body somewhat compressed; head large, deeper than broad; 

 mouth moderate or large, terminal, or the lower jaw projecting a 

 little; maxillary reaching under middle of eye or beyond that point; 

 teeth on jaws, vomer, and palatines; spines on head usually well 

 developed; suborbital ridge or stay feebly to moderately developed; 

 preopercle with 5 spines; opercle with 2; scales moderate or small, 

 generally ctenoid, extending forward on head; no dermal flaps on 

 head; dorsal fin emarginate, with 13 spines and 12 to 16 soft rays; 

 anal with 3 spines and 5 to 9 soft rays; soft parts of vertical fins 

 more or less scaly; caudal round to slightly forked; pectoral generally 

 large, some of the lower rays undivided. 



A single species is known from Peru. 



SEBASTODES CHAMACO (Evermann and Radcliffe) 



Chamaco 

 Figure 87 



Sebastichthys chamaco Evermann and Radcliffe, 1917, p. 136, pi. 12, fig. 3, 



MoUendo, Peru (original description; compared with S. oculata). 

 Sebastodes chamaco Fowler, 1940b, p. 783, Callao, Peru. 



Head 2.4 to 2.6; depth 2.6 to 3.0; D. XII-I, 13 or 14; A. HI, 6; 

 P. 18 or 19; scales about 68 to 75. 



Body elongate, moderately compressed, its greatest thickness about 

 half its depth; dorsal profile rather strongly elevated anterior to origin 

 of dorsal, nearly straight over eyes to nape, caudal peduncle com- 

 pressed, 3.7 to 4.0 in head; snout tapering, 3.8 to 4.1; eye large, 3.9 

 to 4.3 ; interorbital concave, 6.0 to 8.6; mouth large, somewhat obUque; 

 lower jaw projecting, entering dorsal profile, with a well-developed 



