910 
BULLETIN OE THE UNITED STATES FISH COMMISSION. 
Sergestes ventridentatus Bate. 
Sergestes ventridentatus Bate, Challenger Macrura, 431, 1888. Hansen, Proc. Zool. Soc. London, 
1896; 951. 
North of Hawaiian Islands (Bate). 
Leueifer acestra (Dana). 
Lucifer acestra Dana, Crust. U. S. Expl. Exped., I, 671, 1852; atlas, pi. xliv, fig. 9 a-i, 1855. 
Faxon, Mem. Mus. Comp. Zool., XVIII, 1895, 214 and synonymy. 
Distribution. — Between Erben Bank and Kaiwi Channel, 50 fathoms, station 3803; between Hono- 
lulu and Laysan Island, surface, station 3926; vicinity of Kauai Island, surface, station 3981; Hawaii 
(Bate). 
Family CRAGONIDJE. 
Pontophilus gracilis Smith. 
Pontophilus gracilis Smith, Bull. Mus. Comp. Zool., X, 1882, 36, pi. vii, figs. 2-3a; Kept. U. S. Fish 
Commr. for 1885, 654 [50], pi. xi, figs. 1-2, 1886. Alcock, Desc. Cat. Indian Deep-Sea Crust. 
Dec. Macr. Anom., 115, 1901, and synonymy. 
Distribution!— South coast of Molokai Island, 430 to 371 fathoms, station 3826; between Honolulu 
and Kauai Island, 508 to 557 fathoms, station 4007 ; vicinity of Kauai Island, ‘286 to 804 fathoms, stations 
4018, 4021, and 4137; west coast of Hawaii Island, 670 to 697 fathoms, stations 4036 and 4039; vicinity 
of Modu Manu, 762 to 1,059 fathoms, stations 4153 and 4157. 
The specimens do not exceed 30 mm. in length. 
Pontophilus modumanuensis, sp. nov. 
A small species, represented by only one specimen from vicinity of Modu Manu, 293 to 800 fathoms, 
station 4166 (Cat. No. 30543). 
Carapace with rostrum as long as first three and a half segments of abdomen. 
Rostrum long, slender, spiniform, exceeding eyes a little but 
not nearly reaching end of first antennular segment; armed on basal 
half with two spines on each side. 
Two median spines just behind the rostrum, the anterior the 
smaller. Median carina stopping short of posterior margin of cara- 
pace. Two lateral carinse; the upper unarmed and continuous with 
the side margins of the rostrum; lower carina very short, terminating 
anteriorly in a spine which is slightly behind the posterior median 
spine. A small antennal, a long branchiostegal spine. 
Abdomen almost smooth, punctate, telson wanting. 
Eyes light reddish-brown in alcohol. 
Basal spine of antennula very slender and reaching nearly to end of first antennular segment; 
peduncle not reaching middle of acicle; third segment half as long as second; flagella half as long as 
carapace (rostrum inclusive) ; outer flagellum a little thicker and shorter than inner. Scale of antenna 
also about half as long as carapace, its spine exceeding blade. A small spine on outer side of second 
antennal segment; peduncle reaching to middle of second antennular segment; flagellum nearly as 
long as body. 
The maxillipeds overreach the acicle by one-fourth length of their last segment. 
The first pair of legs reach just to end of acicle; the second pair halfway along merus of first pair; 
third pair exceed acicle with last two joints; fourth pair reach just to end of acicle; fifth pair about 
same length, tip broken. 
Length of carapace and rostrum 5.3 mm., length of abdomen, telson excluded, 10.5 mm. 
3 
Fig. 63 . — Pontophilus modumanuen- 
sis, type, carapace and antennal 
region, x 4f. 
