222 
Mr. Home on the Mode of breeding , &c. 
a The orifice which receives the ova, beyond which the 
oviduct is slit open. 
b b The first portion of the oviduct, 
cc The second portion. 
d d The third portion, containing the ova inclosed in the 
capsule ; they are three in number; beyond them the capsule 
comes to a point, and these processes are filled with a trans- 
parent jelly. 
Fig. 2. The young squalus acanthias. 
Fig. 3. The ovum of the squalus canicula, containing the 
young fish, with the yolk attached to it ; and shewing the slits 
by which the salt water gets to the membranes of the young : 
the bristle enters one aperture, and comes through the other. 
Fig. 4,. The young squalus canicula. 
Plate XIII. 
The uterus and lateral canals of the kanguroo, in the im- 
pregnated state. 
a a The vagina. 
b b The openings of the lateral canals into it. 
cc cc The two lateral canals, one laid open. 
d d The two sides of the uterus. 
e e The openings of the fallopian tubes. 
f The imperfect septum of the uterus. 
g The ovarium slit open to shew the corpus luteum. 
