FISHES OF HAWAIIAN ISLANDS. 
401 
Color in alcohol, pale dusky olivaceous, lower parts palest; dorsal and anal with pale purplish 
brown, mottled with lighter; edge of dorsal and anal each with a narrow blackish border, edged 
posteriorly with whitish; caudal dirty brownish, narrowly edged with white, ventrals whitish, dusky 
at tips; pectoral dusky at base, lighter at tija. 
The only known examples of this species are the type obtained by Doctor Jenkins at Honolulu in 
1889, a single cotype secured by the Albatross at Honolulu in 1896, and 2 specimens which we have 
from Samoa. Length, 12 inches or less. 
Acanthurus incipiens Jenkins, Bull. U. S. Fish Comm., XXII, 190'2 (Sept. 23, 1903), 480, fig. 32, Honolulu (Type, No. 50707, 
U. S. N. M.; cotype, No. 7726, L. S. Jr. Univ. Mus.) 
327. Acanthurus brevirostris (Cuvier & Valenciennes). “ Kalalolo.” Fig. 176. 
Head 4 inlength; depth 2.5 ; eye 4 in head; snout 1.6; interorbital 2.9; D. vi, 27; A. ii, 28; P. 16. 
Body oblong-ovate, the dorsal and ventral profiles equally curved from vertical at base of pectoral 
to caudal peduncle; a long pointed horn extending forward and very slightly downward from upper 
margin of eye, its direction nearly parallel with axis of body, its length equal to distance from tip of 
snout to anterior edge of pupil, its inferior edge about one- fifth greater than diameter of orbit and pro- 
Fig. 176 . — Acanthurus brevirostris (Cuvier & Valenciennes); after Gunther. 
jecting beyond snout a distance nearly equal to diameter of eye; mouth very small, horizontal, slightly 
below axis of body; each jaw with a single series of very- short close-set bluntly pointed canines, their 
edges faintly serrulate; a short, curved groove below nostrils in front of eye, its length 1.4 in eye; gill- 
opening long and much curved, the anterior arm extending forward to vertical of nostrils, length of 
slit equal to distance from tip of snout to posterior edge of pupil; a short groove extending upward and 
forward just back of angle of mouth, its length 1.4 in eye; interorbital space rather broad, convex, the 
median ridge scarcely appearing until on occiput. 
Body and head smooth and velvety when stroked from head backward, but very rough in oppo- 
site direction; each side of caudal peduncle with 2 moderate bony plates, each plate with a rather 
high median keel, highest anteriorly, not hooked in any of our specimens; lateral line complete, appear- 
ing as a slight ridge or raised tube, arched somewhat above the pectoral, thence following curvature of 
the back to caudal peduncle. 
First dorsal spine strong, rough laterally, slightly broadened toward base, inserted in front of 
upper end of gill-opening, its length 2.2 in head; second and third dorsal spines a little longer, 
fourth to sixth a little shorter, the spines alternately stronger and weaker; dorsal rays weak, their 
length about equal to- that of the spines; anal spines slender, the second the longer, about 1.4 in first 
F. C. B. 1903—26 
