CRUSTACEA. 
139 
Taken by Mr. Nuttall in the Columbia river, 
west coast of North America. 
Genus Nephrops, (Leach.) 
N. occidentalis. Mus. Acad. 
Thorace lanuginoso, spinis in serie triplici clispositis ; 
manibus prismaticis, villosis. 
Thorax downy, armed above with three rows of 
strong spines, the middle row commencing behind 
the others, and composed of five or six teeth ; the late- 
ral rows have also about six teeth, and are continued 
upon the base of the rostrum, but terminate within 
the point at which the marginal spines of the front 
commence ; these latter are in number four on each 
side, and a terminal one common to both ; parallel 
with the fifth spine of the lateral thoracic row, and 
on the outer side of it, is a strong spine, almost im- 
perceptibly cleft at base ; no tubercles are visible 
on any part. Anterior feet very spinous above, and 
underneath ; hands somewhat prismatic, with from 
three to five rows of tubercles, more or less spini- 
form on both the inner and outer face, the lateral 
ones ill defined, but the middle row very distinct ; 
the left hand is rather the larger, and the upper and 
under surface of both, together with the prehensile 
side of the pincers, and almost the whole surface of 
the maxillary feet covered with very long, coarse 
hairs ; segments of the abdomen sculptured as in 
the N. norwegicus. 
Length half a foot. 
Brought from the west coast of North America 
by Mr. Nuttall. 
