390 
BULLETIN OF THE UNITED STATES FISH COMMISSION. 
high, rounded, posterior not produced; eighth dorsal ray 1.25 in head, anal spines graduated to third, 
which is 1.8 in head; ninth anal ray 1.2; caudal long, deeply emargmate, the upper and lower lobes 
produced in long sharp points; pectoral 3.5 in body; ventrals sharp pointed, 2 in head; caudal 
peduncle compressed, depth 2.25; caudal spine moderately large, 4 in head, depressible in a groove. 
Color in alcohol, deep blackish-brown, side with many dusky brown longitudinal vermiculating 
lines; dorsal and anal blackish at base, paler on terminal portion, with 4 rather broad brown longi- 
tudinal bands; caudal blackish-brown; pectoral blackish-brown, margin broadly dull buff; ventrals 
blackish on greater portion, innermost basal portion slaty. 
Described from an example (No. 0566(1) taken at Honolulu. 
The species is known only from Seychelles (the type locality) and the Hawaiian Islands. One 
specimen 7.25 inches long was secured by Jenkins and 2 others (13 and 17 inches long) by us at 
Honolulu. This species may not he distinct from II. guntheri or H. viatoides. 
Acanthurus xdnthopterus Curvier i Valenciennes, Hist. Nat.. Poiss., X, 215, 1835, Seychelles. 
Teiithis xanthopterui:, Jenkins, Bull. IT. S. Fish Comm., XXII, 1902 (Sept,. 23, 1903), 477 (Honolulu). 
318. Hepatus dussumieri (Cuvier & Valenciennes). “ Pu&lu;” “ Palau i. Fig. 169. 
Head 3.35 in length; depth 1.9; snout 1.4 in head; eye 4.5; interorbital 3.2; D. ix, 27; A. in, 26. 
Body deep, upper and lower profiles nearly evenly convex, greatest depth about middle of length 
Fig. 169 .—Hepatus dussumieri (Cuvier & Valenciennes); after Gunther. 
of trunk; head deep, compressed, upper profile evenly and obliquely convex from tip of snout to 
origin of dorsal; jaws large, inferior, very slightly produced; mouth small, inferior; teeth broad, 
compressed, edges crenulate; margin of preopercle very oblique, angle in front of anterior rim of orbit; 
eye small, high, in posterior third of head; nostrils small, close together, anterior with small fleshy 
flap, posterior a short oblique slit; interorbital space broad, convex; dorsal spines graduated to 
posterior, last 1.75 in head; seventh dorsal ray 1.5; posterior dorsal and anal rays rounded, not 
produced in points; anal spines graduated to last, which is 2.4; seventh anal ray 1.5; pectoral 3.5; 
ventral sharply pointed, 1.25 in head; spine 2.8; caudal large, emarginate, upper rays produced in a 
point beyond lower; caudal peduncle compressed, its depth 2.5 in head; caudal spine rather large, 
depressible in a, groove, 3.5 in head; scales very small, ctenoid, crowded, few on soft dorsal, anal, and 
caudal, minute; lateral line concurrent with the profile of back, more, or less running down to caudal 
spine in front. 
