GAMMARTD.E. 



broadest below ; the rest of the leg is only equal in 

 length to that of the thigh. The antepenultimate pair 

 of caudal appendages have the plates as long as the 

 peduncle, those on the two posterior pairs are shorter, 

 and the middle piece consists of two narrow, unarmed 

 plates, with a few fine spines at the extremity. 



The only place from which this species has been re- 

 ceived is that of Plymouth Sound, where it was taken 

 by us with the dredge. 



The vignette is by Mitchell, and represents the Mew 

 Stone, Plymouth Sound. 



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