FISHES OF HAWAIIAN ISLANDS. 
435 
forward from eye; 5 narrow, dark lines across head between eyes; a dark median line from tip of lower 
jaw to vent; side of snout with 2 vertical and 2 horizontal brown lines; fins all pale, the caudal with 
converging light-brown lines on base. 
This species is known only from the type, a specimen 3.5 inches long, collected near Kihei, Maui, 
by Mr. Richard C. McGregor. 
Tropidichthysepilamprus Jenkins, Bull. U. S. Fish Com., XXII, 1902 (Sept. 23, 1903), 485, fig. 33, Kihei, Maui. (Type, No. 
50853, U. S. Nat. Mus., Coll. R. C. McGregor.) 
358. Canthigaster bitseniatus (Jenkins). Fig. 191. 
Head 2.66 in length of body; depth a little greater than head. Back compressed, culminating in a 
very obtuse point above middle of pectoral fin. Profile from tip of snout to before eyes somewhat 
concave, straight from interorbital to top of dorsal prominence, descending in a straight line from here 
to base of caudal fin, being interrupted, however, at middle by elevation bearing dorsal fin. Ventral 
outline evenly curved, no more convex than the dorsal; eye 3.33 in head; snout 1.75 in head; inter- 
orbital concave, slightly greater than eye, 3 in head; one nostril in each side, each a simple opening 
with slightly raised margin, but scarcely tubular; distance from eye to nostril 2 in distance from 
nostril to tip of snout; front of dorsal tin midway between dorsal prominence and base of caudal fin, 
outline rounded; rays 10, longest 1.5 in snout; caudal slightly rounded, median rays equal distance 
from tip of snout to center of pupil; anal similar to dorsal, front of. its base below posterior end of base 
Fig. 191 . — Canthigaster bitseniatus (Jenkins); from the type. 
of dorsal; pectoral broad (in specimen median and lower rays on both sides broken), upper rays 2.5 
in head; a few minute spines on lower surface of body; surface otherwise smooth. 
Color in alcohol, general color brown or dusky above, paler brownish below; a wide dusky band 
from base of upper rays of the caudal running forward along side of body, above base of pectoral, to 
upper end of gill-slit, here becoming narrow and curving downward around anterior edge of gill-slit, 
then backward again below it as a narrow band below base of pectoral and along side of body, parallel 
with the upper band, to a little below middle of caudal fin, a black spot on outer side of base of pectoral; 
bases of upper and lower caudal rays black. One specimen, 2.04 inches long, secured by Dr. Wood at 
Honolulu. It is apparently not distinct from the Japanese species, C. rivulatus (Schlegel). 
Eumyderias bitseniatus Jenkins, Bull. U. S. Fish Com., XIX, 1899 (June 8, 1901), 400, fig. 12, Honolulu (Type, No. 49702, U. S. 
Nat. Mus.); Jenkins, Bull. U. S. Fish Com., XXII, 1902 (Sept. 23, 1903), 486 (Honolulu; type specimen). 
Tetrodon caudofasciatus, Steindaehner, Denks. Ak. Wiss. Wien, LXX, 1900, 518, pi. m, fig. 3 (Laysan); not of Gunther. 
Family LXXX. DI0D0NTID4i. — The Porcupine Fishes. 
Body short, broad, depressed above; belly moderately inflatable, covered everywhere except on 
the lips and caudal peduncle with spines, which are usually 2-rooted or 3-rooted at their bony base; 
caudal peduncle short and slender; mouth moderate, terminal, each jaw covered with a bony plate like 
the beak of a bird, these not divided by a median suture; nostrils on each side forming a small tentacle, 
usually with 2 openings; eye rather large, gill-opening moderate, immediately in front of the pectoral. 
