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



length of upper jaw 3.3 to 3.8; postorbital part of head (hind margin 

 of eye to upper edge of gill opening) 2.6 to 2.8; interorbital width 3.1 

 to 3.3; depth of caudal peduncle 1.9 to 2.0; length of pectoral fin 1.1 

 to 1.2, of pelvics 1.0 to 1.1, of longest dorsal spine (3rd, 4th or 5th) 

 1.8 to 1.9, of upper caudal rays 0.9, of lower caudal rays 1.0 to 1.5; 

 all in length of head (tip of snout to posterior margin of opercular 

 membrane). Depth of caudal peduncle in its length 1.0 to 1.2; 

 angle of snout profile with lengthwise axis of body 59 to 64 degrees, 

 snout profile convex. 



Teeth of jaws in single series, long, curved, expanded basally, flat- 

 tened distally, tips truncate; scales extending onto snout to about 

 even with nostrils, rest of snout and preorbital naked; suborbital 

 sco,led; vertical margin of preopercle scaled, lower horizontal margin 

 naked; opercle with one flat triangular spine, opercular membrane 

 narrow, only slightly wider than opercular spine is long; dorsal spines 

 increasing in length to 3d, 4th and 5th subequal, the rest successively 

 very slightly shorter; soft dorsal angular in young, rounded m largest 

 specimens; anal angular; upper caudal lobe angular, lower rounded, 

 pelvics with outer ray filamentous, pectoral angular. 



Color in alcohol. — Lips pale, tip of snout and chin sometimes dark 

 brownish, sometimes pale yellowish; black ring around margin of 

 eyeball, most intense dorsally, opercle plain yellovrish or with several 

 (6 to 8) white spots slightly smaller than pupil; sometimes smaller 

 white spots on preopercle and sometimes margins of preopercle dark 

 reddish brown; ground color of head and back rich brownish or 

 blackish, scales of sides with thin vertical dark brown marginal line, 

 giving appearance of fine crosshatching, ground color of sides light 

 yeflowish ; small specimens usually with a white transverse bar under 

 the base of 4th to 6th spines extending toward anus, fading on belly; 

 this bar is usually lost in largest specimens over 60 mm., but may be 

 retained indistinctly by some (sometimes bar is indistinct or absent 

 in small specimens 30 to 40 mm.), a black ocellus as large as eye at 

 base of last dorsal spines present in young, becoming indistinct in 

 specimens over 50 mm. and usually disappearing in those over 60 

 mm.; a small black spot present on base of last soft dorsal rays; a 

 large distinct black spot on base of upper rays of pectoral fin, growing 

 larger and more distinct with age; dorsal fin dark brown or blackish, 

 except tips of dorsal rays, which are paler; caudal dusky or blackish 

 basally; anal blackish; pelvics dark brown or blackish; pectorals pale. 



Remarks.— Abuderfdvj behnii Bleeker has XIII dorsal spines and 

 belongs in a difl'erent subgenus. We have examined the type (USNM 

 61678) of A. corneyi Jordan and Dickerson and find it to be identical 

 with our specimens of A. leucozona from Guam. This species varies 

 considerably in color pattern from young to adult stages but our 



