REPORT OK FISHES COLLECTED IK THE HAWAIIAN ISLAKDS. 
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17. Gymnothorax thalassopterus Jenkins, new species. 
Head 8.5 in length; depth 13.5; eye 10.5 in head; snout 5.75; interorbital 6.5; gape 2. 
Body long, slender, and compressed; vent a little nearer tip of snout than tip of tail; head rather 
short, rather strongly compressed, broadest above; top of head strongly swollen; profile of snout 
nearly straight to nape, thence rather strongly elevated; interorbital space somewhat convex; mouth 
large, the gape long, somewhat wavy, the jaws even, closing completely; posterior edge of orbit a 
little nearer tip of snout than angle of mouth; teeth in jaws in a single series on each side, some of 
them canine-like anteriorly, those on sides compressed and directed backward, those on vomer large, 
fang-like, and depressible; anterior nostrils each in a short tube or papilla near tip> of snout; posterior 
nostrils each without tube, situated just in front of line vertical from front of orbit; gill-opening a long, 
narrow slit, a little shorter than snout in length, its distance behind angle of mouth equaling length 
of gape; origin of dorsal a little in front of vertical at gill-opening; dorsal rather low, its greatest 
height less than snout; anal still lower, its greatest height scarcely exceeding diameter of orbit. 
Color in life (No. 03548), A r ery dark brown, nearly black, the light interspaces smoky-yellow; 
outer margin of vertical fins lemon yelloAV, below which the color is bright green, gradually losing 
itself in dark brown. 
Color in life of No. 03375, body and fins mottled yellowish and .brown, the brown forming irregular 
granular spots of various sizes, but all less than the pupil; fins a little darker, no pale edges; gill- 
opening and angle of mouth black; throat-streaks brownish and the spots on jaws smaller. 
Color in life of No. 305, brown, with spots and mottlings of darker brown; black spot larger than 
eye about opercular opening; margins of dorsal and anal bright green; margin of caudal yellow. 
Color in alcohol of the type, pale brownish, profusely covered Avith small, roundish or irregular 
darker brown spots and blotches, varying considerably in size and also in depth of color, some being 
Fig. 7 . — Gymotliorax leucacme Jenkins, neAV species. Type. 
mere specks, others as large as the pupil, some pale brown, scarcely darker than the ground color, 
others almost black; blotches and spots often more or less coalescing, forming reticulations; dorsal and 
anal fins colored like the body, the edges dark; tip of tail narrowly white; head somewhat darker than 
body; angle of mouth somewhat dark, with a few white specks; gill-opening with a dark brown or 
blackish border. One specimen (No. 03722) has a narrow bluish- white line from angle of mouth over 
the nape. In many of the specimens the narroAV Avhite border on the tail extends some distance 
forward on the dorsal and anal fins. S £> ~ 3 ‘ 
This is one of the largest and most abundant eels found among the Hawaiian Islands. It reaches 
a length of 3 feet. One specimen (No. 305) 14 inches long, was secured by me at Honolulu, where 
numerous examples were taken by Jordan & Evermann. One example Avas obtained by them at 
Cocoanut Island, Hilo. 
Type, No. 50619 (field No. 03772), U. S. N. M., 23 inches long, collected by Jordan & Evermann 
in 1901, at Honolulu. 
18. Gymnothorax leucacme Jenkins, neAV species. 
Head nearly 8 times in total length; depth 2.3 in head; snout 5.6 in head; anus nearer tip of snout 
than tip of tail; distance from tip of snout to anus, in the type, 9.5 inches; from tip of tail to anus nearly 
