170 
GAMMAKIDiE. 
common in the order; the fourth joints are dilated pos- 
teriorly, and distally produced to a point — these and the 
two following joints are fringed with small hairs ; the 
fingers are straight and posteriorly directed. The seventh 
or last pair of legs are very long, three or four times as 
long as the others ; the coxa is quite as deep as that of 
the preceding legs ; the second joint is about half as 
long as the preceding legs, considerably dilated, and the 
posterior margins fringed with hair; the third joint is 
short, the three following are subequally long and nar- 
row ; the finger is as long as the hand, short, straight, 
styliform, and anteriorly directed. The posterior pair of 
caudal appendages are not longer than the preceding, and 
have the branches longer than the peduncle. The central 
tail-piece is nearly as long as the peduncle of the last pair 
of caudal appendages. 
We first took a mutilated specimen of this animal from 
some trawl-refuse, in the neighbourhood of Plymouth ; 
it was from this imperfect animal that the original de- 
scription, in the Catalogue of the British Museum, was 
made. The Rev. A. M. Norman has subsequently al- 
lowed us to examine a specimen which he procured on 
the coast of Northumberland. We have dedicated this 
species to our valued correspondent, Mr. Stimpson, the 
zoologist of the United States’ Expedition to Japan, by 
whom the genus was established upon animals procured 
off the coast of the United States, and to whom we are 
indebted for many named species of his crustaceous dis- 
coveries. 
