244 TJ.S. NATIONAL MUSEUM BULLETIN 202 Vol. 2 



the ventral row, usually ii,13 pectoral rays; white teeth covered by 

 the lips; a broad preorbital distance, 2.5 to 3.1 times in head; and a 

 broad naked space below the eye. Another characteristic is the 

 concave space just in front of the eyes, which gives the snout a more 

 or less narrow, or pointed, profile when viewed from a dorsal aspect. 



SCARUS LUNULA (Snyder) 



Callyodon lunula Snyder, Proc. U. S. Nat. Mus., vol. 35, p. 99, 1908 (type 

 locality, Naha, Okinawa; holotype USNM 62236); Proc. U. S. Nat. Mus., 

 vol. 42, p. 509, pi. 66, fig. 2, 1913. 



SPECIMENS STUDIED 



Bikini Atoil, lagoon 4 miles southwest of Bikini Island, spearing over sub- 

 merged coral head, depth 45 feet, July 11, 1946, Brock, Herald and Kohler, 

 S-46-247, 1 specimen, 270 mm. 



Ecology. — This rare species was captured but once by spearing in 

 about 40 feet of water over a coral head 4 miles southwest of Bikini 

 Island in the lagoon. It seems to be rare in the northern Marshall 

 Islands and probably was not distinguished from other species when 

 collected. 



Remarks. — This species is distinguished by 4 median predorsal 

 scales, 3 rows of scales on the cheek, with 2 or 3 scales in the ventral 

 row; ii,12 pectoral fin rays, white teeth, and by its coloration of three 

 color streaks in the anal fin, edge of upper lip green, then pink, then a 

 green streak from snout past lower edge of eye; especially notable is 

 a green edge on operculum in front of pectoral fin base, and one or 

 two green streaks connecting eyes across interorbital space. The 

 dorsal part of body and the head is purplish brown. All of the speci- 

 mens observed have a characteristic hump in front of and over the 

 orbits. 



SCARUS FORMOSUS Cnvier and Valenciennes 



Scarus formosus Cuvier and Valenciennes, Histoire naturelle des poissons, vol. 

 14, p. 283, 1839 (type locality, Sandwich Islands; type examined in Mus. 

 Nat. Hist. Nat. Paris, No. 585). 



SPECIMENS STUDIED 



Bikini Atoll: Bikati, Makin, John Randall, 1 specimen, 160 mm. 



Arji Island, August 7, 1946, S-46-308, 1 specimen, 52 mm. 



In addition to the types several other specimens have been studied. 



Remarks. — This species is characterized by having 4 median 

 predorsal scales, usually with a pair in front of the anteriormost 

 median scale, 3 rows of scales on the cheek with 1 or 2 scales in the 

 ventral row; white teeth and ii,12 pectoral rays. The color pattern 

 in region of pectoral, posterior part of head below and behind eye dull 

 yellowish tan grading to yellow ventrally and yellow orange antero- 

 ventrally. Dorsal part of head bright green; upper lip yellowish 

 green; irregular areas of turquoise blue on chin connecting with green 



