8s Mr. Home's Description of the Anatomy 
a cavity corresponding to the uterus of other animals, where it 
is hatched; which lizards may therefore be called ovi-viviparous; 
and I find a very close resemblance between them. In these 
lizards there are two uteri, that open into one common canal or 
vagina, which is extremely short ; and the meatus urinarius 
is situated between these openings. The coats of these uteri are 
thinner than those of the uteri of quadrupeds of the same size. 
In the ovi-viviparous dog-fish, the internal organs of the fe- 
male have a very similar structure. There is therefore every 
reason to believe, that this animal also is ovi-viviparous in its 
mode of generation. 
EXPLANATION OF THE DRAWINGS. 
See Plates II. III. and IV. 
Plate II. 
Fig. i. Represents the hind leg of the male, in order to shew 
the situation and appearance of the spur. 
Fig. e. Represents the tongue, in its natural situation; and 
shows its relative position to the grinding teeth, and the lower 
portion of the bill ; also the two pointed teeth upon the tongue 
itself. 
On the outside of the jaw, on each side, are the pouches for 
the food. 
The glottis, epiglottis, and oesophagus, are represented of the 
natural size. 
Fig. 3. The loculated caecum, with a portion of the ilium 
and colon. 
Plate IIL 
Represents the bones of the chest and pelvis, in their relative 
