Fig. 1. 
‘ie 
MR. R. OWEN ON THE ANATOMY OF THE CALYPTRAID#. 
PLATE XXX. 
Outside view of the shell of Calyptrea Byronensis, Gray. 
. Inside view of the same shell. 
a. The front part of the shell, corresponding to the head of the animal. 
b. The internal cup. 
. The soft parts of the same species from the ventral aspect. 
. The soft parts of the same species from the dorsal aspect. 
. The soft parts of a female specimen of the same species from the ventral 
211 
aspect, with the head turned down to show the orifice of the branchial 
chamber and the terminations of the rectum and oviduct. 
dorsal aspect. 
. The soft parts of a male specimen of the same species dissected from the 
The principal ganglia of the nervous system. (A bristle is passed through 
the wsophagus.) 
The same letters are used for the same parts in each figure. 
VOL. I. 
a. The mouth. 
b. The tentacles. 
b*. The eyes. 
c. (Fig. 6.) The penis. 
d. The aliform expansions of the neck. 
e. The anterior expansions of the foot. 
f. The foot. 
f*. The apex of the foot lodged in the cavity of the cup. 
f**. The point of attachment to the shell. 
. The mantle. 
. The branchial filaments. 
. The tongue supporting the horny rasp. 
. The salivary glands. 
. The esophagus. 
. The stomach. 
. The intestine. 
The anus. 
. The liver. 
. The testis. 
= 
~ re, 2 
sa So 8 83 
QF 
. The entry, or beginning, h'. the end, of the branchial chamber. 
