154G Bulletin //, United States National Musenm. 



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



and anal reaching past base of caudal-, caudal fin moderately forked, its lobes 



mostly rounded ; dorsal spino.s 13 or 14. 



Hfi iases (^Xid^u), to grow -warm in the sun) : , , , 



: DorsaUpine; 13-/ interorbital spacet broad and flattish; eye l-^-;J;?S 'fLs 



f. Caudal and other fins plain dusky. insolatus, 1958. 



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



a bhie line on each side of head. encheysuuus 1059. 



Subgenus FURCARIA, Poey. 

 1954. (HBOMIS ATRILOBATUS, Gill. 

 Head about 4A in total length; depth about 3^. D. XII, 12; A. II, 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 

 ^vidth 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 iu front, 

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

 of ventrals, spinous portion rather elevated, its la.st spines shorter than 

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

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

 tin forms more than a (luarter (.27) of the extreme length, its lol>e8, 

 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, (aicr, black; lohntus, 

 lobed.) 

 Chromis (Furearia) atrilobata,lGiLU Proc. Ac. Nat. Sci. Phila. 1862, 149, Cape St. Lucas. 



(Coll. Xantus.) * 



Chromis atrilohata. Gill, Proc. Ac. Nat. Sci. Phila. 1863, 220; Jordan & Gilbert, Proc. 



U. S. Nat. Mus. 1882, 360. 



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



and the interorbital spaio hish and rdumled as in Fvroarin and Ayresia. The caudal 

 iieduucl. a- ill Ihlhisrs i^ sliiiiti>li. Uir (lovsa! and anal i-racliinii past front of caudal. 



tAlthou-h tliclonn ..I siilioil.iial ana in y/(/i((.«N sums to lie (juite unlike tliat in J^HT- 

 caria and 'chruinix. tin- ditli-i cncc is niainlv external. The supraoccipital crest is not 

 extended on tlie frontals in any "f them. It is merely a little lower in Heliases, with uo 

 other peculiarities in form or extension. 



J Dr. Gunther has wrongly identified this species with the Brazilian species, 



Chromis marginatus (Castelnan). 



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

 spines T.\ ratlier low ; .■^ealt-H 3-30-10. Body obloug-elliptical, with long caudal peduncle; 

 head narrow ; i'iteidi l)iial space high, rounded; gill rakers numerous, long and slender; 

 pectoral a liitle lon-er tlian head, not quite reacliing anal; soft dorsal and aual low, 

 pointed behind, not rearliing 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 tin 

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

 without blue spots on the scales. 



