120 BULLETIN 95, UNITED STATES NATIONAL MUSEUM. 



Cuvier and Valenciennes base their description of the species 

 Helioses crusma upon two individuals 5^ inches long from Valpa- 

 raiso, Chile, and include an individual 8 inches long from Juan 

 Fernandez Island, indicating certain differences between this ex- 

 ample and those from Valparaiso. Specimens in our collection from 

 Mollendo, Callao, and Santa Eosa Island agree very well with their 

 description of the Valparaiso examples; other specimens in our col- 

 lection taken at Guanape and Lobos de Afuera present certain of the 

 differences indicated in their example from Juan Fernandez Island 

 and possess other characters which serve to definitely separate the 

 latter as a distinct species, to which we have given the name Chromis 

 intercrusTna, 



The type (field No. 09403) from Guanape North Island has the 

 following comparative measurements: Head 3.2 in length; depth 

 2.15; eye 3.9 in head; snout 4; maxillary 3.04; D. XII, 14; A. II, 

 14; P. 20; scales 3^-27-10, 20 pores. 



Body short, deep, ovate, and compressed, the curvature of the 

 dorsal and ventral outlines nearly equal; snout short, conical, shorter 

 than eye; interorbital rounded, with a slight depression in center; 

 teeth conic, in three or four interrupted rows, those in outer row 

 slightly larger than others; opercle, preopercle, and suborbital en- 

 tire; vertical border of preopercle nearly straight, the angle rounded; 

 opercle ending in two flat, rather obscure spines; fourth to sixth 

 dorsal spines longest, equal in length, 2.4 in head; middle rays of 

 soft dorsal longest, acute, longest ray 1.75 in head; caudal forked, 

 upper lobe slightly the longer, longer than head, 0.87; second anal 

 spine moderate, 2.12 ; soft anal acute or slightly rounded posteriorly, 

 longest ray 1.92; ventrals moderate, reaching to behind vent, 1.4; 

 pectoral rounded, shorter than head, 1.09 ; scales large, regular, close- 

 set, ctenoid, covering all of body and head except snout and tip of 

 lower jaw ; those on upper surface of head, around eye, on cheeks and 

 under surface of head, small and crowded. * 



Color in alcohol, brown, centers of scales dark brown, marginal 

 half lighter on those below the lateral line, the separation of the 

 two colors niost distinct ventrally; dorsal, anal, and ventrals very 

 dark brown; caudal dusky brown, inner margin of lobes lighter; 

 pectoral tawny, base dark brown, darkest in upper angle ; a trace of 

 blue iridescence near posterior border of opercle. 



A paratype (field No. 09457) has the following comparative meas- 

 urements: Head 3.16 in length; depth 2.06; eye 3.33 in head; snout 

 4.2; interorbital 3 ; pectoral 1 ; D. XII, 14; A. II, 13; scales 31-27-10. 

 Coloration like that of the type but darker. 



Color in life of a paratype (field No. 09445) : Dusky bluish; a 

 black spot in axil of pectoral. 



