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



ABUDEFDUF GLAUCUS (Cuvier and Valenciennes) 



Plate 87,A 



Glyphisodon glaucus Cuvier and Valenciennes, Histoire naturelle des poissons, 



vol. 5, p. 475, 1830 (type locality, Guam). 

 Abudefduf antjerius (not Kuhl and Van Hasselt) Kendall and Goldsborough 



Mem. Mus. Comp. Zool., vol. 26, p. 297, 1911. 



SPECIMENS STUDIED 



Bikini Atoll: 13 stations, 189 specimens, 13 to 84 mm. in standard length. 



Eniwetok Atoll: 4 stations, 54 specimens, 44 to 87 mm. 



Rongelap Atoll: 1 station, 133 specimens, 20 to 59 mm. 



Rongerik Atoll: 3 stations, 12 specimens, 17 to 60 mm. 



Kwajalein Atoll: 1 station, 1 specimen, 56 mm. 



Arno Atoll: 1 lot, 1 specimen, 31 mm. 



Rota Island: 2 lots, 59 specimens, 12 to 72 mm. 



Guam: 18 lots, 376 specimens, 13 to 58 mm. 



Saipan: 1 lot, 1 specimen, 21 mm. 



Description.— Dov&dX fin rays XIII, 12; anal rays 11,12; pectorals 

 ii,15 to 17 (usually 16); transverse scale rows from upper edge of gill 

 opening to base of caudal rays, 26 to 28 (usually 27), with 2}^ between 

 lateral line and origin of dorsal, 8 or 9 between lateral line and origin 

 of anal; upper part of lateral line with 17 or 18 (usually 18) tubular 

 scales; giU rakers 7 or 8 + 1 + 14, totaling 22 to 24 (4 counts). 



Depth of body 2.0 to 2.4; head 3.0 to 3.4; both in standard length 

 (tip of snout to base of caudal rays). Snout 3.4 to 4.5; eye 2.0 to 

 3.4; preorbital width 7.8 to 12.6; length of upper jaw 3.3 to 3.6; post- 

 orbital part of head (hind margin of eye to upper edge of gill opening) 

 2.6 to 3.2; interorbital width 3.3 to 5.0; depth of caudal peduncle 

 1.8 to 2.3; length of pectoral fin 1.2 to 1.4, of pelvic fin 1.0 to 1.2, 

 of 13th dorsal spine 1.8 to 2.0, of upper caudal raj^s 0.9 to 1.0, of 

 lower caudal rays 1.0 to 1.1; all in length of head (tip of snout to 

 hind margin of opercular membrane). Depth of caudal peduncle 

 in its length 1.1 to 1.5; angle of snout profile with lengthwise axis 

 of body 56 to 58 degrees, snout profile convex. 



Teeth of jaws, crowded, long, slender, slightly curved, rounded 

 basally, flattened, rounded tips, in two rows, inner row smaller, 

 tips of teeth fitting between teeth of outer row; scales of interor- 

 bital region extending to anterior margin of eye, snout and area 

 around nostrils naked; orbital bones and both margins of preop- 

 ercle naked; opercular spines 2, broad, flat, small, scarcely evident 

 in large examples; dorsal spines subequal a,fter 4th; soft dorsal and 

 anal outlines angular, caudal slightly forked, lobes rounded, pec- 

 toral rounded. 



Color in alcohol. — Lips pale dusky brown to grayish, head, back 

 and upper sides uniform light reddish brown, grayish brown or pale 



