218 
GAMMARIDiE. 
small extent. He describes the second pair of gnatho- 
poda as terminating in a simple non-prehensile form, 
whilst he figures them as seen in our drawing ; and the 
first he calls chelate, whilst in the two species which we 
have had the opportunity of examining the finger is 
almost obsolete. 
Dana has, in his valuable work on Crustacea, evidently 
confused this genus with Atylus of Leach, to which all 
his species, except perhaps I. nodosa, undoubtedly be- 
long. 
The following vignette represents the pier-head at 
Lynmouth, on the north coast of Devonshire. 
