218 



GAMMARIB2B. 



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 /. nodosa, undoubtedly be- 

 long. 



The following vignette represents the pier-head at 

 Lynmouth, on the north coast of Devonshire. 



