of the Pacific Shores of North America. 919 
ovate, deeply excavated below for the reception of the point 
of the finger, which is more than half as long as the hand. 
Color pale green ; antenne red. Length, half an inch. 
This species is closely allied to A. Pugettensis, but is 
smaller, and more compressed; the superior antenn:e are 
more setose, and the hand.of the first pair is different in 
shape, the palm being much less oblique. 
It is common at San Francisco, living among barnacles 
and seaweed on stones and the piles of wharves, in the 
littoral zone. 
Mus. N. P. Exp. 
ALLORCHESTES PLUMULOSUS. Stimpson. n. s. 
In this species, the inferior antennæ are about one third 
as long as the body, and thickly tufted with plumose hairs 
along the inferior edge; the terminal joint of the peduncle, 
and all the joints of the 11-articulate flagellum except those 
hear the extremity, being provided below with plume-like 
bundles of branching sete, as well as the usual simple ones 
above and on the sides. The superior antenne have only 
a few, simple sete, which are, however, of considerable 
ngth. The hand of the second pair is oblong, two-thirds 
as broad as long, and rather quadrangular than ovate, with 
the palm curved, less excavated, and with a much less 
Prominent projection at the extremity of the finger than in 
Preceding species ; the finger is scarcely half as long as 
the hand, Tn other characters this species has consider- 
able resemblance to A. seminuda. Length, two fifths of an 
a Color, greenish. 5 
k 48 common on gravelly shores in the littoral zone near 
mouth of San Francisco Bay. 
- Mus. N. P, Exped 
