of the lamprey and myxine. 
texture, which extends higher than the testicle; this I consider 
to be the kidney. On the forepart of the testicle is the duct or 
vas deferens ; this is laid open at its termination to show that 
it forms, with the opening into the belly, a common cavity 
just within the verge of the anus. 
Fig. 2. A portion of the ovarium and testicle of the natural 
size, when the ova are beginning to enlarge. 
