116 



U.S. NATIONAL MUSEUIM BULLETIN 202 



Vol. 2 



Table 88. — Measurements of Pomacentrus traceyi in thousandths of standard 



length. 



Characters 



Standard length in mm 



Depth of body 



Length of head.- 



Length of snout 



Length of eye 



Width of preorbital 



Length of upper jaw 



Length of postorbital 



Width of interorbital 



Depth of caudal peduncle- 

 Length of pectoral fin 



Length of pelvic fin 



Length of sixth dorsal spine- 

 Length of upper caudal rays 

 Length of lower caudal rays. 

 Length of caudal peduncle -. 



Holotype 



(USNM 

 141310) 



36 

 472 

 348 



69 

 119 



24 

 100 

 117 



89 

 153 

 292 

 342 

 153 

 349 

 328 

 181 



Paratype 

 (USNM 

 141309) 



27.4 

 474 

 329 



77 

 139 



24 

 102 

 120 



84 

 157 



362 

 168 

 318 

 285 

 172 



Paratype 

 (USNM 

 141309) 



39.7 

 482 

 315 



68 

 118 



25 

 103 



98 



81 

 161 

 307 

 338 

 171 

 343 

 310 

 201 



POMACENTRUS BIFASCIATUS Bleeker 



Plate 88, C 



Pomacentrus bifasciatus Bleekek, Nat. Tijdschr. Nederl.-Indie vol. 6, p. 330, 

 1854 (type locality, Larantuka, Flores). 



SPECIMENS STUDIED 



Guam: 2 specimens, 19 and 31.7 mm. in standard length. 



Description. — Dorsal rays XIII, 14 or 15; anal 11,14; pectoral ii,15 

 or 16; transverse scale rows from upper edge of gill opening to base of 

 caudal rays 28, with 3 between lateral line and origin of spiny dorsal, 

 10 between lateral line and origin of anal, upper part of lateral line 

 with 16 tubular scales; gill rakers 9 + 1 + 19. 



Depth of body 2.1 to 2.2; length of head 1.6 to 3.0; both in standard 

 length. Snout 3.3 to 4.0; eye 2.6 to 2.9; preorbital width 10.7 to 18.0; 

 length of upper jaw 3.1 to 3.3; postorbital part of head (hind margin 

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

 to 4,0; depth of caudal peduncle 1.9 to 2.3; length of pectoral fin 1.2, of 

 pelvic fin 0.9 to 1.4, of 6th dorsal spine 1.9 to 2.3; caudal rays broken 

 on both specimens; all in length of head (tip of snout to hind margin 

 of opercular bone). Depth of caudal peduncle in its length 0.9 to 

 1.0 ; angle of snout profile with lengthwise axis of body 45 to 47 degrees. 



Teeth of jaws biserial, those of outer row larger, pointed, inner row 

 smaller, fitting closely into spaces between teeth of outer row; scales 

 on top of head covering interorbital area, not extending farther for- 

 ward than anterior margin of eye, not reaching nostrils, snout naked; 

 preorbital and suborbital narrow (less than diameter of pupil), naked. 



