es its pexteot tate, 3 it would ae highly interdaling It is 
highly organized than any other genus of Opistho-brauehiata, 
ling ia be more nearly than — pee a probwbly car- 
orm and external appearance as usual in the genus. benpth 
breadth 5 inches, heigith about the same. Calar r pale gray 
a te peoouene purplish on ad oe folds of m: wae _ 
foot bhibk: ps very aipale: Shell srategaed in - : 
ce of the mantle cartilaginous, translucent, trapezoidal | or. 
shaped, margins rownded, slightly convex above, the nu-— 
uter in the old specimens distant from the posterior end — 
< Faint rediating lines diverging nee the nucleus, - 
elisieese network of darker lines, all ending abrupt- — 
stan¢ | the margin, which has thus a wide, near- 
n accessory plate arises on the inner 
‘at all, but resemble the typical Aplysia i inthe form of 
On this paced 1 ant | unwilling to constitute ita new wee 
