174 MR. J. COUCH ON APLYSIA MELANOPUS. [ Mar. 24, 
greatly bruised and mutilated, and was thus deprived of the lively 
colours which the first possessed. As I have never seen the species 
before, I have judged these animals worthy of particular notice ; and 
I think that the more perfect example is deserving of a minute 
Fig. 1. 

Aplysia melanopus, nat. size. 
a, mouth ; 4, ¢, tentacles; d, reproductive organ (this and the eye scarcely 
visible in the woodcut) ; e, foot, of a dark colour. 
Fig. 2. 
Nucleus. 

Shell of Aplysia melanopus, showing nucleus to be nearly central. 
description, as also of a place in the British Museum. Measured 
in a straight line, its length is 43 inches ; it is very plump, especially 
posteriorly, where, in girth, it measures 6 inches. That part which 
forms the head projects; and in front of it is the mouth (a), which 
