114 
CRUSTACEA. 
and three or four obtuse, but well defined longitu- 
dinal elevations on the outer side; intermediate 
spaces reticulated with small elevated lines, pre- 
senting to the eye a kind of cellular texture ; ante- 
rior inner tooth of the carpus well defined ; pincers 
canaliculate, brown, inclining to black ; four poste- 
rior pairs of feet flattened on the sides, having the 
upper edge sharp, but gradually dilating in the 
direction of the tarsus, and covered above and 
underneath, throughout their whole length, with 
long, dense, light brown hair, which, on the upper 
side of the two last joints of most of the feet, as well 
as on the tarsi, is disposed in longitudinal rows. 
A single female specimen brought by Mr. Nut- 
tall from the Sandwich Islands. Its length is 
about l T s o inches; greatest breadth fully two inches. 
It is probably very nearly related to the X. inci- 
sus, (Edw.) but that species is described as having 
on the outer face of the hands, several ranges of 
tubercles, and many small transverse crests on the 
carapax over the hepatic and stomachal regions. 
The X. Rumphii, (Guerin,) (X. octodentatus, 
Edw.) seems also to be nearly allied to it, but there 
the front is but little advanced, and divided into 
only two lobes ; the anterior angles of the carapax 
seems also to form a curved line with the front, 
whereas, here they are produced almost to a level 
with its outer lobes. 
The X. acasta, (Cancer acasta, Herbst.) is pro- 
bably another very nearly allied species, but its 
carapax, according to M. Edwards, appears to be 
smooth. 
