246 U.S. NATIONAL MUSEUM BULLETIN 202 Vol. 2 



wliite line in alcoholic specimens of all sizes and not with a broad 

 dusky margin as in forsteri. The black spot at base of upper pectoral 

 rays is evident at all ages. The edges of both Ups are dark in alcohol, 

 not pale. In the brown phase a dark spot sometimes occurs basally 

 between dorsal spines I and II. 



Ecology. — The brown color phase is abundant on the shallow parts 

 of the reefs. 



SCARUS FORSTERI Cuvier and Valenciennes 



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

 14, p. 275, 1839 (type locality, Tahiti). 



SPECIMENS STUDIED 



Bikini Atoll: 1 station, 1 specimen, 117 mm. in standard length. 



Eniwetok Atoll: 2 stations, 2 specimens, 152 to 190 mm. 



Jaluit Atoll: 1 lot, 1 specimen, 180 mm. 



Arno Atoll: 1 lot, 1 specimen, 142 mm. 



Guam: 1 lot, 5 specimens, 180 to 230 mm, 



Saipan: 1 lot, 3 specimens, 200 to 260 mm. 



Remarks. — This species may be recognized by a combination of 

 characters: 4 median predorsal scales, 2 rows of scales on the cheek; 

 pectoral rays usually ii,12; a black spot at base of pectoral, usually 

 well developed; Ups almost covering whitish teeth; canine teeth, 

 usually numbering on upper jaw 1 + 1, 1+2 or 2+2, and on lower jaw 

 1 + 1 or 2+2; the important color marks are the green edges of the 

 lips, the dark line submarginally along distal edge of caudal fin, and 

 broad pale edge (green when aUve) of anal fin, and the dorsal fin set 

 off submarginally by a dark fine. 



SCARUS SORDIDUS Forsk&I 



Scarus sordidus ForskAl, Descriptiones animalium, pp. x, 30, 1775 (type locality, 

 Arabia) . 



SPECIMENS STUDIED 



Bikini Atoll. 22 stations, 226 specimens, 14.5 to 240 mm. in standard length; 

 1 lot, Univ. Washington, 5 specimens, 120 to 145 mm. 



Rongelap Atoll: 10 stations, 133 specimens, 12 to 145 mm. 



Rongerik Atoll: 4 stations, 19 specimens, 17 to 210 mm. 



P^niwetok Atoll: 6 stations, 66 specimens, 41 to 185 mm. 



Likiep Atoll: 1 lot, Univ. Washington, 23 specimens, 35 to 80 mm. 



Guam: 4 lots, 34 specimens, 16 to 240 mm. 



Rota: 1 lot, 1 specimen, 13 mm. 



Saipan: 1 lot, 1 specimen, 180 mm. 



Remarks. — This species is characterized by having 4 median pre- 

 dorsal scales, 2 rows of scales on the cheek; pectoral rays usually ii,13; 

 teeth white in young, becoming green in adults in green color phase. 

 The immature are brownish or reddish brown with a pale (pink when 



