1546 Bulletin 47, United States National Museum. 



II. Body oblong or ovate, rather deep, the caudal peduncle short, the last rays of dorsal 

 and anal reaching past hase of caudal ; caudal fin moderately forked, its lobes 

 mostly rounded; dorsal spines 13 or 14. 

 HELIASES (r)Aiao>, to grow warm in the sun) : 



e. Dorsal spines 13; * interorbital space t broad and nattish; eye large; body deep. 

 /. Caudal and other fins plain dusky. INSOLATUS, 1958. 



ff. Caudal, posterior half of dorsal and anal, and whole of pectorals, deep yellow ; 

 a blue line on each side of head. ENCHKYSURUS 1959. 



Subgenus FURCARIA, Poey. 

 1954. CHROMIS ATRILOBATUS, Gill. 



Head about 4| in total length; depth about 3. D. XII, 12; A. 11,12; 

 scales 4-32 or 33-10, 21 pores. Head longer than high, the forehead and 

 snout above nearly rectilinear ; interorbital area transversely arched, its 

 width equaling diameter of eye ; preopercle oblique, its lower half scarcely 

 emarginate, its angle rounded; mouth small and very oblique; teeth 

 conic, curved, continuous to the angles of the mouth, larger in front, 

 a transverse row of smaller ones behind. Origin of dorsal fin above base 

 of ventrals, spinous portion rather elevated, its last spines shorter than 

 the proceeding; second anal spine as long as the succeeding rays, which 

 are nearly uniform or even slightly increased toward the last; the caudal 

 fin forms more than a quarter (.27) of the extreme length, its lobes, 

 especially the upper, prolonged and pointed ; pectorals long and bluntly 

 angulated; first ventral ray filiform and equal to the pectorals, its base 

 behind that of the pectorals. Color olivaceous (the type deep green from 

 the stain of a copper tank), the dorsal blackish except last 4 or 5 rays, 

 which are colorless; a very distinct spot of sulphur yellow just behind 

 dorsal fin extending obliquely downward and forward; margins of caudal 

 above and below, black. Length about 4 inches. (Gill.; Cape San 

 Lucas and southward ; rare ; 2 or 3 specimens known, (ater, black ; lobatns, 

 lobed.) 



Chromis (Furcaria) ariZo&ata, J GILL, Proc. Ac. Nat. Sci. Phila. 1862, 149, Cape St. Lucas. 



(Coll. Xantus.) 

 Chromis atrilobata, GILL, Proc. Ac. ISTat. Sci. Phila. 1863, 220 ; JORDAN & GILBERT, Proc. 



U. S. Nat. Mus. 1882, 366. 



* In the European subgenus Chromis there are 14 dorsal spines ; the head is narrow, 

 and the iuterorbital space high and rounded as in Furcaria and Ayresia. The caudal 

 peduncle, as in Heliases, is shortish, the dorsal and anal reaching past front of caudal. 



t Although the form of suborbital area in Heliases seems to be quite unlike that in Fur- 

 caria and Chromis, the difference is mainly external. The supraoccipital crest is not 

 extended on the frontals in any of them. It is merely a little lower in Heliases, with 110 

 other peculiarities in form or extension. 



{Dr. Giinther has wrongly identified this species with the Brazilian species, 



CHROMIS MARGINATUS (Castelnau). 



The following notes are taken on specimens of C. marginatus from Bahia. Dorsal 

 spines 12, rather low; scales 3-30-10. Body oblong-elliptical, with long caudal peduncle; 

 head narrow; interorbital space high, rounded; gill rakers numerous, long and slender; 

 pectoral a little longer than head, not quite reaching anal; soft dorsal and anal low, 

 pointed behind, not reaching base of caudal; upper lobe of caudal longest, the fins deeply 

 forked. Color, bluish olive, a black spot within axil and on base of pectoral; dorsal 

 black, except the last rays ; each lobe of the pointed caudal black, the middle of the fin 

 pale ; traces of 3 lengthwise stripes of yellow on the body. Close to Chromis cyaneus, but 

 without blue spots on the scales. 



