160 U.S. NATIONAL MUSEUM BULLETIN 2 02 Vol. 2 



ward from eye on snout and 3 more radiating from posterior side of 

 eye; about 3 white lines, notably narrower than others around eye, 

 extending from eye partly across cheek; rays of median fins green, 

 membranes hyaline; middle of pelvic fins dusky or blackish; pectoral 

 hyaline. 



CHEIUNUS RHODOCHROUS Gunther 



Plate 91, B 



Cheilinus rhodochrous Gunther, in Playfair and Gunther, the fishes of Zanzibar, 



p. 90, pi. 9, fig. 3, 1866 (type locality, Zanzibar). 

 Cheilinus unifasciatus Streets, U. S. Nat. Mus., Bull. 7, p. 82, 1877 (type locality, 



Fanning Islands; types USNM 19223, 19224). 



SPECIMENS STUDIED 



Bikini Atoll: 6 stations, 13 specimens, 73 to 168 mm. in standard length. 

 Rongerik Atoll: 1 station, 1 specimen, 70 mm. 

 Rongelap Atoll: 2 stations, 2 specimens, 86 and 89 mm. 

 Rota Island: 1 lot, 2 specimens, 195 and 225 mm. 



Description. — Counts arc recorded in table 98. 



Head 2.4 to 2.5; greatest depth 2.7 to 3.0; longest pectoral ray 6.0 to 

 6.8; snout tip to anus 1.6; snout to dorsal origin 2.3; all in standard 

 length. Snout 2.3 to 2.8; eye 4.5 to 6.7; postorbital length of head 2.0 

 to 2.1; interorbital space (bony) 4.8 to 7.0; longest pectoral fin ray 2.5 

 to 2.8; least depth of body 2.7 to 3.1 ; all in length of head. Distance 

 between anterior and posterior nasal openings 7 to 11 in snout; eye 

 0.9 to 2.0 in flesh}'' interorbital space. 



Dorsal profile of head slightly convex, without any concave area at 

 interorbital space, forming an angle of 40 to 50 degrees with ventral 

 contour of head and body; lower jaw slightly projecting, when mouth 

 is closed; maxillary reaching to a vertical line through rear nasal open- 

 ing but not quite to eye; head except cheek and operculum naked and 

 dorsal side scaled forward nearly to interorbital space; body scaled, 

 but scales along bases of dorsal and anal fins scarcely forming a sheath ; 

 pectoral fin reaches to opposite sixth or seventh lateral line scale; first 

 or second branched pectoral ray longest; pelvics not reaching to anus; 

 caudal fin rounded, outer rays scarcely elongated even in longest 

 specimens. 



Color in alcohol. — Background coloration brownish, with a trans- 

 verse white or pale bar across caudal peduncle at rear of bases of both 

 dorsal and anal fins, this white bar one scale wide; radiating fore and 

 aft from eye are a few white or grayish white streaks, and nearly at 

 right angles below eye are white streaks that extend toward the isthmus 

 but not on it (in our specimens) ; sometimes a pale streak a Uttle wider 

 than the others extends from the eye across operculum to upper edge 

 of pectoral fin base; young may have lengthwise pale and darker 



