126 U.S. NATIONAL MUSEUM BULLETIN 202 Vol. 3 



peduncle naked; hind margin of caudal fin straight to slightly convex; 

 first unbranched pectoral ray less than half height of second; anal fin 

 origin posterior to insertion of last dorsal ray. 



Color in alcohol. — Color of head and body light brown to dark 

 brown, arranged in a network with round or oval white spots in spaces; 

 network of dark brown lines extending onto lower sides and forward 

 along sides to below eye, network disappearing anteroventrally; light 

 spots a little larger than size of pupil of eye, larger than dark spaces 

 between except on back and upper sides; some light spots with dark 

 centers, especially those of back and on dorsal part of head; snout, 

 cheeks, and sometimes breast with small dark dots; two dark narrow 

 parallel lines extending forward from anus on midline of belly to breast; 

 eye with about 9 radiating dark lines, sometimes indistinct, none 

 anterior to eye, crossing over top of snout or to mouth; lower and 

 posterior radiating lines from eye merge into dark brown network; no 

 dark ocellate spot at base of dorsal fin ; dorsal, anal, and pectoral fins 

 pale; caudal fin plain without spots, rays yellowish, membranes 

 dusky or translucent. 



Remarks. — C. jactator differs from C. janthinopterus in lackmg the 

 ocellate spot below base of dorsal fin and the streaks crossing dorsal 

 surface of snout. These two species are represented by C. punctatis- 

 simus Giinther in the American tropical Pacific. 



CANTHIGASTER BENNETTI (Bleeker) 



Plate 142,B 



Tropidichthys bennetti Bleeker, Nat. Tijdsclir. Nederl.-Indie, vol. 6, p. 504, 

 1854 (type locality, Amboina). 



SPECIMENS STUDIED 



Marianas Islands: Guam Island, Apra Bay on reefs, Nov. 19-21, 1907, Al- 

 batross, 1 specimen, 65 mm. 



Samoa Islands: Rose Island, reef, June 11-14, 1939, Schultz, 1 specimen, 

 female, 50 mm. (USNM 115298). 



Description. — Dorsal rays i,9; anal i,7 or i,8; pectoral rays ii,13; 

 branched caudal rays 3+4; gill rakers 7 to 9 on anterior side of first 

 gill arch (in 3 counts). 



Greatest depth of body 2.5 to 2.7; width of body at pectorals 3.65 to 

 4.4; length of head 2.3 to 2.6; length of caudal fin 3.2 to 3.9; all in 

 standard length. Snout 1.5 to 1.95; diameter of eye 3.5 to 4.3; 

 least depth of caudal peduncle 2.7 to 3.3; length of pectoral fin 2.3 

 to 3.1; height of dorsal fin 2.2 to 2.8; height of anal fin 2.7 to 3.3; 

 postorbital part of head 3.8 to 4.5; interorbital width 4.1 to 4.9; all 

 in length of head. Angle of snout profile with axis of body 36 to 42 

 degi'ees, snout straight in small specimens (36 mm.), almost straight, 

 slightly concave, in larger examples (50 and 65 mm.). 



