CRUSTACEA. 
143 
and as long as the squamous plate of the external 
antennae, armed with fifteen teeth on the upper side 
and with four beneath; second pair of feet very un- 
equal, the left being considerably longer than the 
body ; both are densely covered with almost invisi- 
ble spines and close down ; carpus about two-thirds 
of the length of the hand, very small at base, but 
gradually enlarging anteriorly ; the left hand very 
large, being three times as thick as the arm, and 
considerably inflated ; pincers about as long as the 
hand, and when closed leave a great space between 
their prehensile sides, which are armed each with 
one or more great teeth, and with as many smaller 
ones at base, their outer sides are marked with 
some black spots, more or less distinct ; four poste- 
rior pairs of feet short and slender ; eyes white. 
Length about 2 \ inches. 
Length of the left foot of the second pair, 34 
inches. 
Brought by Messrs. Nuttall and Townsend from 
the Sandwich Islands. 
P. graciliinanus. Mus. Acad. 
Rostro 13-vel 14-dentato, recto, squamis antennarum 
longiore ; testa polita, utrinque bispinosa ; pedum pare 
secundo elongato, gracilibus, manibus verrucosis. 
Rostrum rather broad, compressed, straight, but 
directed a little upwards at tip, a little longer than 
the basal plates of the antenna;, armed on the upper 
side with about thirteen teeth, and beneath with 
five or six serratures ; a strong spine on each side 
the thorax, and a very small one behind it ; second 
