IA2 
GAMMA RTDzE. 
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. 
