926 
BULLETIN OF THE UNITED STATES FISH COMMISSION. 
Family GNATHOPHYlLIDAi. 
Gnathophyllum fasciolatum Stimpson. 
Gnathophyllum fasciolatum Stimpson, Proc. Acad. Nat. Sci. Phila., XII, 1860, 97 [28]. 
Twelve small specimens, each about 7 mm. long, were taken at the surface at station 3921, south 
coast of Oahu Island. In alcohol they are colorless. 
The rostrum does not quite reach the end of the first antennular seg- ■' 
ment, and has five or six teeth above and a small one subterminal below. 
The eyes are relatively larger than in G. elegans (Risso), the sixth ■ j 
abdominal segment more elongate, and the caudal spines not so near the 
fig. 74 .-Gnathophyllum fascio- extremity, the anterior pair being at the middle of the telson. 
latum,, station 3921, second foot, The palm of the second pair of chelipeds is one and a half times as 
x 12. long as the fingers. 
An examination of more Indo-Pacific material might prove this to 
be a new species. Stimpson’ s description is too brief to permit of certain identification. 
Family NEMATOCARCINIDtE. j 
Nematocarcinus ensiferus (Smith). 
Eumiersia ensifera Smith, Bull. Mus. Comp. Zool., X, 1882, 77, pi. xin, figs. 1-9. 
Nematocarcinus ensiferus Smith, Rept. Commr. Fish and Fisheries for 1882, 368 [24], pi. vii, fig. 1, 
1884; Rept. Commr. Fish and Fisheries for 1885, 664 [60], pl.xvn, fig. 2, 1886. 
Nematocarcinus tenuipes Bate, Challenger Macrura, 812, pi. cxxxii, fig. 6, 1888; Alcock, Desc. Cat.. ? 
Indian Deep-Sea Crust. Dec. Macr. Anom., 87, 1901. 
Nematocarcinus ensifer Faxon, Mem. Mus. Comp. Zool., XVIII, 1895, 156.. 
The specimens are all rather small and the rostrum ranges from one-half in the larger to one- 
fourth in the smaller individuals of the length of the carapace, and the dorsal crest bears from twenty- j 
three to twenty-six spines and one or none below. 
Distribution. — Vicinity of Modu Manu, 293 to 1,059 fathoms, stations 4153 and 4166; vicinity of | 
Niihau Island, 735 to 865 fathoms, station 4174; vicinity of Kauai Island, 1,000 to 1,314 fathoms, station 
4185; 6 specimens in all. 
Nematocarcinus tenuirostris Bate. 
(PI. xxiii, fig. 6.) 
Nematocarcinus tenuirostris Bate, Challenger Macrura, 817, pi. cxxxii, fig. 10, 1898; Alcock, Desc. ’ 
Cat. Indian Deep-Sea Crust. Dec. Macr. Anom., 88, 1901. 
This is the most abundant of the Hawaiian species of Nematocarcinus. The rostrum is from two- 
thirds to one-half as long as the rest of the carapace; in young specimens still shorter, between one- 
third and one-fourth of remainder of carapace. Rostrum usually horizontal, its lower margin straight 
as far as the subterminal spine; upper margin slightly convex, tip spiniform. Dorsal teeth nine to 
thirteen, from two to five behind the orbit, a few of the posterior teeth nearer together than the rest; 
ventral spines one or two. 
Third abdominal tergum moderately produced and bluntly rounded; sixth twice as long as fifth. 
The antennular peduncle reaches halfway along the acicle. The outer maxillipeds reach to or I 
nearly to the distal fourth of the acicle. The first pair of feet exceed the acicle by length of chela and 
about one-fifth of carpus. The three last pairs are very elongate, being considerably longer than the 
body, and if extended would reach beyond the acicle by length of chela, carpus, and two-thirds of 
merus. A few distant spines arm the merus and distal end of ischium. 
Color. — Bright pink. 
This species, as Alcock has indicated, differs from N. ensiferus chiefly by the fewer rostral teeth 
and longer legs. , 
