86 U.S. NATIONAL MUSEXJM BULLETIN 2 02 Vol. 2 



upper jaw 3.5 to 4.0; postorbital part of head (hind margin of eye to 

 upper edge of gill opening) 2.9 to 3.5; interorbital width 3.0 to 3.4; 

 depth of caudal peduncle 1.7 to 2.1; length of pectoral fin 1.0 to 1.1, 

 of pelvic fin 0.9, of third dorsal spine 1.7 to 3.0, of upper caudal ray 

 0.8 to 0.9, of lower caudal rays 0.8 to 0.9; all in length of head (tip 

 of snout to hind margin of opercular membrane). Depth of caudal 

 peduncle in its length 0.8 to 1.0; angle of snout profile with length- 

 wise axis of body 53 to 60 degrees, snout profde convex, steeper in 

 large specimens. 



Teeth of jaws cylindrical on basal %, tips flattened, truncate or 

 rounded, entire in adults, 1 or 2 notches in young; preorbital and sub- 

 orbital entire, naked; preopercle entire, margins not scaled, 3 rows of 

 scales on cheeks; scales on head only to narrowest part of interorbital, 

 opercle with broad, flat, triangular spine, interorbital convex; pre- 

 orbital width increasing with size of specimens; soft dorsal and anal 

 fins angular, spiny dorsal spines increasing in length to 3rd, 4th, or 

 5th (which are subequal), then decreasing to 12th, 13th about as long 

 as third; caudal lobes angular. 



Color in alcohol. — Lips pale or dusky on sides only, membrane on 

 maxillary black; head dark brownish, sometimes preorbital and sub- 

 orbital grayish and naked portion of preopercle whitish; opercular 

 membrane blackish, dusky brown, or pale; body with 7 light grayisli 

 or yellowish transverse vertical bars alternating with 6 dark brownish 

 or blackish bars of about equal width; spiny dorsal fin membranes 

 grayish with narrow black margin, soft dorsal usually dark basally, 

 paler distally, anal entirely dark, or same as dorsal; caudal dusky, 

 usually tips of rays blacldsh and sometimes upper and lower margins 

 dusky, pel vies dark grayish; pectorals pale, a small black spot on 

 pectoral base at its upper insertion. Young specimens (under 50 

 mm.) same as adults, with similar number of transverse bars but with 

 a large black spot on anterior dorsal spines and a black saddle across 

 dorsal part of caudal peduncle, just behind dorsal fin. 



Remarks. — Young (under 50 mm.) of this species and of A. sordidus 

 are similar in color pattern; they can be distinguished readily by the 

 number of dorsal and anal fin rays, A. sordidus having 15 dorsal and 

 14 or 15 anal rays. 



ABUDEFDUF SEXFASCIATUS (Lacep^de) 



Plate 85, C 



Labrus sexfasciatus LacepIjde (on Commerson), Histoire naturelle des poissons, 

 vol. 3, pp. 430, 477, pi. 19, fig. 2, 1802 (type locality, the "Great Ocean"). 



SPECIMENS STUDIED 



Saipan Island, coral reefs, June 1945, F. B. Shroyer and T. S. White, 4 speci- 

 mens, 10 to 35 mm.; Guam, 1945, D. G. Frey, 2 specimens, 60 and 63 mm. 



