of the Pacific Shores of North America. 519 



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 ; antenna? red. Length, half an inch. 



This species is closely allied to A. Pugettensis, but is 

 smaller, and more compressed ; the superior antenna? 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. Stimpsou. n, s. 



In this species, the inferior antenna? 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 nagellum except those 

 near the extremity, being provided below with plume-like 

 bundles of branching seta?, as well as the usual simple ones 

 above and on the sides. The superior antenna? have only 

 a few, simple seta?, which are, however, of considerable 

 length. 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 

 the preceding species ; the finger is scarcely half as long as 

 the hand. In other characters this species has consider- 

 able resemblance to A. seminuda. Length, two fifths of an 

 inch. Color, greenish. 



It is common on 'gravelly shores in the littoral zone near 

 the mouth of San Francisco Bay. 



Mus. N. P. Exped. 



