346 BULLETIN 189, UNITED STATES NATIONAL MUSEUM 



These "color phases" form the basis for the several local names. 

 It is possible, however, that both species are included under the names 

 given, and that all the colors mentioned do not apply to one species. 



The body apparently is a little deeper than in B. diplotaenia, as 

 shown by the proportions offered. It seems probable, also, that the 

 number of gill rakers on the lower limb of the first arch and the average 

 number of anal rays may be slightly lower. Comparing specimens of 

 equal size (those of B. diplotaenia being from Panama) of the limited 

 material now available, it appears that the lobes of the dorsal, anal, 

 and caudal are less produced in B. eclancheri and that the ventral fins 

 are rather longer. However, there is variation in these characters 

 among the specimens of each species. 



Although Evermann and Radcliff e (see reference above) stated that 

 the teeth in the two species here compared are "essentially the same," 

 the specimens now at hand differ noticeably, B. eclancheri having the 

 enlarged teeth in the jaws flattened, incisorlike, whereas they are 

 little, if at all, flattened but rather strictly caninelike, in B. diplo- 

 taenia. The specimens of B. eclancheri, examined by Evermann and 

 Radcliffe, unfortunately, are not available at present. 



It is evident from the foregoing comparisons that B. diplotaenia and 

 B. eclancheri are closely related but that not enough^specimens are now 

 at hand to determine the exact relationship. 



According to the report of the Mission (1943, p. 279) this species is 

 of limited commercial importance. B. diplotaenia\ndPimelometopon 

 darwinii, which are not mentioned among the commercial species, 

 may make up part of the catch, as these related species, all living in 

 rocky places, probably are not separated for the market. 



Range. — Northern Peru and the Galdpagos Islands. 



Genus!PIMELOMETOPONIGill,!l864 



This genus differs from Bodianus chiefly in having smaller scales, 

 there being about 50 to 65 in a longitudinal series and 8 or 9 rows 

 between the lateral line and first dorsal spine. 



A single species is known from Peru. 



PIMELOMETOPON DARWINI (Jenyns) 



Mulata; Vieja colorada 



Cossyphus darwini Jenyns, 1842, p. 100, pi. 20, Chatham Island, GaMpagos 



(original description). 

 Pimelometopon darwinii Abbott, 1899, p. 359 (no locality, synonymy only).— 



Evermann and Radcliffe, 1917, p. 127, Lobos de Afuera, and MoUendo, 



Peru (synonymy; description). — Nichols and Murphy, 1922, p. 511, North 



Chincha Island and Lobos de Tierra Island, Peru. 



Head 3.0 to 3.15; depth 2.8 to 3.0; D. XII, 10; A. Ill, 11 or 12; 

 P. 18; scales 53 to 56. 



