North American Lizards. 
27 
The ovaries (Ov.) are small bodies situated close to the dorsal wall 
of the body cavity. The right one ( is placed just a little anterior to 
the left. Each is supported by a fold of peritoneum, which is at- 
tached firmly to the dorsal wall of the abdominal cavity. 
The oviducts (Ovd.) are not very complexly convoluted. They be- 
gin anteriorly with a broad slit like ostium (Os.)* which opens into 
the body cavity. The anterior portions of the oviducts are large 
very thin walled tubes which are flattened out and wrinkled. They 
gradually get smaller and thicker posteriorly. Around their extreme 
posterior ends there is a muscular band. They open into the cloaca 
through two distinct apertures. 
The kidneys are practically like those of the male. The same 
may be said of the ureters, which open into the cloaca at the same 
points as the oviducts do. 
The adrenals (Ad.) were present as two golden yellow bodies im- 
bedded in the folds of the peritoneum which support the ovaries. 
3. Crotaphytus collaris. 
(a) male. (PI. IV., Fig. 13.) 
The specimen examined was an old museum specimen which had 
evidently been in formalin for a long time, and measured from the 
tip of the snout to the vent about 10cm. 
The testes (T.) were badly shrunken, but it was estimated that in 
a fully distended condition they would measure about 8mm. by 6mm. 
A noticeable peculiarity concerning their arrangement was that, con- 
trary to the general rule in lizards, the left testicle was placed some- 
what anterior to the right one. 
The spermaducts (Vd.) are tubes which arise from the collecting 
tubules coming off from the anterior ends of the testes. They are 
complexly coiled into ribbon-like masses, held together by connective 
tissue and pass, dorsal to the testes, back to the anterior ends of the 
kidneys. The spermaducts enlarge considerably at this point and 
run across the ventral surfaces of the kidneys, each expanding into 
a bladder-like seminal vesicle just before opening out with the cor- 
responding ureters on two small papillae in the cloaca. 
The kidneys (K.) are rather long and narrow, and measure about 
35mm. in length and about 3.5mm. in width at this greatest diame- 
ter. The anterior ends are distinctly separate, while the posterior 
are closely applied to each other. There is also a bridge of kidney 
substance connecting the two kidneys at about their middle point. 
There is no tendency to division into lobes, and there is no notice- 
able demarcation of lobules on their surface. There is, however, a 
considerable notch in the lateral edge of each. 
