42 
OttCHESTXIBift. 
merous, and differ slightly in shape. The 
whole structure is dotted with granular 
markings, but no trace of the original 
cell-formation is apparent. 
The hairs, which are scattered over the 
legs, though formed upon the same plan as in Talitrus , 
terminate in a slight, but sharp point ; and the small 
secondary branch has a peculiar bead-like appearance. 
The habitat of this animal is along the coast, between 
the ordinary high water-mark and that of spring-tides. 
In places where it is found, it appears to be more abun- 
dant than the Orchestic, 
It is of a dark green colour, and, when dead, may 
easily be distinguished amongst many others by a metallic 
lustre. 
We have received specimens from Penzance, sent to 
us by Mr. George Barlee and Mr. W. Webster; from 
Moray Frith, by the Rev. Geo. Gordon ; from Falmouth 
and Tenby, by Mr. W. Webster; and have taken them 
ourselves on the shores of Plymouth Sound. 
As it was from this species that our knowledge of the 
genus was first obtained, we named it originally after the 
illustrious American carcinologist, by whom the genus 
was founded ; but, upon further examination, we believe 
it to be identical with Amphithde Nilssonii , of Rathke, 
and which he first regarded as identical with Amphithde 
Prevostii of Edwards. 
