134 



U.S. NATIONAL MUSEUM BULLETIN 2 02 



Vol. 3 



SPECIMENS STUDIED 



Bikini Atoll: Bikini Island, ocean reef, March 22, S-46-15, Schultz and Brock, 

 1 specimen, female 491 mm. in standard length; USNM 140772. 



Bikini Atoll: Bikini Island, ocean reef, speared in grotto on lithothamnium 

 ridge, July 17, 1946, Univ. Washington, 1 specimen, male, 480 mm.; USNM 152982. 



Bikini Atoll: IJ^ miles west of Bikini Island in lagoon at 20 fathoms depth, 

 July 23, 1946, Univ. Washington, 1 specimen, male, 620 mm. 



Eniwetok Atoll: Oct. 17, 1954, Halstead; USNM 164483. 



Description. — The counts are recorded respectively for the three 

 specimens: Dorsal rays i,10; i,10 and i,10; anal i,10; i,10 and i,10; 

 pectoral i,16-i,17; i,16-i,17 and i,16-i,17; branched caudal rays always 

 4+4. 



Measurements made on the three specimens are recorded in table 132 

 in thousandths of the standard length. The following proportional 

 measurements were made: Length of head 2.5 to 2.8; depth of body 

 2.8 to 3.3; both in standard length. Snout 1.7 to 2.7: eye (bony orbit) 

 4.7 to 5.5; least depth of caudal peduncle 2.4 to 2.8; length of pectoral 

 fin 2.6 to 3.0; height of dorsal fin 1.9 to 2.2; of anal fin 2.0 to 2.2; 

 length of caudal fin 1.4 to 1.5; postorbital part of head 2.5 to 2.9; 

 interorbital width 2.2 to 2.4; all in length of head. Angle of snout 

 profile with lengthwise axis of body about 30 to 35 degrees. 



Back smoothly rounded; head somewhat angular; interobital flatish; 

 snout profile almost straight to slightly convex ; dorsally head and body 

 with close-set minute spinules except on posterior part of caudal 

 peduncle, bases of all fins, and top of snout; nasal tentacle forked, 

 lateral line white and distinct without supra-anal branch; distal 

 margins of dorsal and anal fins rounded; pectoral rounded to almost 

 straight; caudal rounded to truncate. 



Color in alcohol. — The 491 mm. female specimen: Top of head, 

 cheeks, and back light grayish brown with small, close-set dark brown 

 to blackish spots, about 1.5 to 3,5 mm. in diameter; spots on cheeks 

 and sides mostly round, those of top of snout, head, and back 



Table 132. — Measurements on three specimens of Arothron alboreticulatus ex- 

 pressed in thousandths of standard length 



Standard length in mm 



Head ..- 



Depth 



Snout 



Eye 



Least depth of caudal peduncle 



Length of pectoral fin 



Height of dorsal fin 



Height of anal fin 



Length of caudal fin 



Postorbital part of head 



Interorbital 



620 

 392 

 360 

 213 

 77 

 164 

 137 

 197 

 194 

 268 

 142 

 168 



