62 MR. T. BELL ON THE CRUSTACEA 
The first pair of feet in the male are much larger and longer than the others: in the 
female they are the smallest of all. They are covered with scattered granulations, but 
are without spines. The claw is obtuse, the fingers curved, meeting only at the point, 
which is obtuse, rounded, and denticulated. The remaining feet are nearly equal, co- 
vered with short hair, the nails moderately curved. 
Colour light brown, covered with darker hair ; the first pair of feet reddish. 
Length 1 inch 5 lines ; breadth, including the lateral spines, 1 inch 7 lines. 
Two specimens, a male and a female, were obtained by Mr. Cuming at Puerto Port- 
rero, in Central America, on sand, at the depth of thirteen fathoms. 
Genus AcantHonyx, Latr. 
AcantHuonyx Periveri, Edw. 
Found by Mr. Cuming at the Gallapagos Islands on fine coral sand at the depth of 
five fathoms ; and by Mr. Miller on the coast of Brazil. 
Genus Epratrus, Edw. 
EPIiALTus DENTATUS, Edw. 
Ep. rostro bifido ; dente minimo utrinque ante orbitam ; margine lateral rotundato, haud 
marginato, dentibus tribus et tuberculo unico. 
Found by Mr. Cuming at Valparaiso in crevices of rocks in deep water. 
EPIALTUS MARGINATUS. 
Tab. XI. Fig. 4. 9. Tab. XII. 3. 
Ep. rostro bifido ; dente minimo utrinque ante orbitam ; margine laterali marginato, den- 
tibus duobus anticé et tuberculis duobus ad latera, quorum posterius obsoletum. 
Hab. ad Insulas Gallapagos dictas, D. Cuming ; et ad oras Brasilie, D. Miller. 
Mus. Soc. Zool., Bell. 
The carapax is rounded behind but angular and produced forwards ; the surface even, 
punctate ; and the regions divided by impressed lines. The upper and under surfaces 
are separated by a distinct marginal line, on which are two small tubercles, of which the 
posterior is obsolete, or marked only by a slight turn in the marginal line. The anterior 
margin has two acute prominent teeth. The rostrum is narrowed forwards and bifid ; 
and there is a small tooth on each side in front of the orbit. The orbits are circular 
and entire, and the eyes globular, accurately fitting the orbits and scarcely projecting 
beyond them. 
The internal antenne are lodged in a large fossa, which is open and undivided ante- 
riorly, but divided from behind forwards by a long narrow spine. The external antenne 
are concealed by the rostrum; the basilar joint broad and much produced forwards ; 
the moveable portion cylindrical, shorter than the rostrum. Pedipalps with the outer 
