40 BULLETIN 214, UNITED STATES NATIONAL MUSEUM 



26. Median predorsal scales 5 to 9; scale rows on cheek 3. Subgenus Hem- 



isloma Swainson. 



23a. Dorsal surface of head in front of eye with a dark brown (purplish 



when alive) or greenish squarish blotch. 



24a. An arch-shaped pale band (green when alive) from below corner of 



mouth passing just under orbit to opposite upper pectoral base, 



just above this, behind eye, a broad, dark brown, curved band; 



teeth white ; anterior part of body and head pale, then, beginning 



below dorsal spines VI or VII, posteriorly dark; pectoral rays ii, 



12; usually 3 scales in ventral (third; row on cheek; plate 14,a,b. 



(Central and West Pacific.) dimidiatus Bleeker 



24b. No arch-shaped pale band on lower side of head, as above; blue 

 band below green blotch on snout extending back to eyes; 

 upper lip edged with orange and extending back to eyes; 

 pectoral rays ii,13; 2 scales in ventral (third) row on cheek; 

 plate 18,E. (Mozambique Channel). . . . africanus (Smith) 

 236. Color not as above. 



25a. A blackish ocellate spot (sometimes lacking in preserved specimens) 

 at base of dorsal spines III or IV; dorsal edge of pectoral base 

 black, in some specimens this black may cover entire pectoral 

 base; dorsal part of head brown, abruptly pale below a line 

 from middle of snout past ventral edge of eye to upper pectoral 

 base; anterodorsally the scales have few to several white spots 

 (green when alive); teeth white, lips separated by an angle of 

 25 to 55 degrees; pectoral rays ii,12; caudal peduncle not pale; 

 plate 14, c. (Central and West Pacific, Indian Ocean.) 



globiceps Cuvier and Valenciennes 

 256. Color not as above. 



26a. Background color dark brown or blackish, reddish when alive, 



distinct white spots on numerous scales, at least posteriorly, 



teeth greenish when alive, turning light brownish in alcohol; 



pectoral rays usually ii,13. 



27a. Scattered white spots on scales confined to posterior part of 



body; first soft dorsal ray elongated on adults, no white 



spots on pectoral fin base; plate 13,b-d. (Central and 



West Pacific.) brevifillis (Gunther) 



276. Numerous white spots occurring on anterior and posterior parts 

 of body; no elongate dorsal ray; usually a few white spots 

 on pectoral fin base; plate 14,d. (West Pacific.) 



singaporensis Bleeker 



266. Scales on sides not marked with numerous distinct white spots as 



above. 



28a. Anterior half of body a rich velvety purplish black, rear half 



with 2 dark crossbars, 1 or 2 scales wide, separated by 



white bars (crimson when alive) 1 or 2 scales wide; caudal 



peduncle and caudal fin crimson, with a dark spot on 



middle of caudal peduncle; lips broadly dark crimson; 



plate 14,E. (Western Indian Ocean.) 



rubrofasciatus J. L. B. Smith 



