and Teredo Navalis <, 
e, The oesophagus. 
f, Two glands which lie upon it, 
gg, The stomach. 
h , The liver. 
iiy A portion of one of the testicles. 
ky The beginning of the intestine. 
lly The intestine passing down upon the stomach. 
mm, The breathing organs. 
nn. The two ovaria between them. 
oo. The intestine leading to its termination in the small 
tube behind the large one. 
Fig. 2, Represents the course of the stomach and intestines 
removed from the body. 
a , The oesophagus. 
b, The stomach. 
c. The septum, dividing it into two cavities. 
d. The aperture by which the two cavities of the stomach 
communicate. 
eeee, The course of the intestine to its termination. 
Fig. 3, The internal structure of the animal exposed in a 
posterior view. 
aa, The two boring shells, separated from each other and 
turned back. 
b, The digastric muscle. 
c, The intestine passing over it, and cut off to expose the 
other parts. 
dd. The two testicles. 
ee , The auricles of the heart. 
ff. The ventricle of the heart. 
gg. The artery going to the head. 
