North American Lizards. 
29 
versical (Sv.) just before opening with the corresponding ureter into 
the cloaca. 
The ureters (Ur.) are small tubules which run across the ventral 
faces of the kidneys, each giving off branches at rather regular in- 
tervals until it has reached a point near the anterior end of the kid- 
ney where it breaks up immediately into several branches which 
drain this end of the kidney. 
The kidneys (K.) are rather long and narrow. They measure 
about 10mm in length and 3mm. in width at th,e point of greatest 
diameter. Their anterior ends are divided into imperfect lobes, but 
the notches marking the lobes do not extend very far into the kid- 
ney substance. The posterior ends of the kidneys extend a short 
distance behind the anal aperture. 
A small adrenal (Ad.) was found on the right side imbedded in 
the convolutions of the spermaduct. 
Another species of Phrynosoma ( Phrynosoma cornutum) was ex- 
amined but the essential differences consisted merely in the testes 
being relatively smaller and the windings of the spermaduct slightly 
different. In this form two adrenals were found. PI. I., fig. 4, shows 
the organs of P. CQrnutum. 
(b) female. (PL II., fig. 8.) 
The ovaries (Ov.) are close to the dorsal wall on each side of the 
vertebral column. The left is placed slightly posterior to the right 
one. 
The oviducts (Ov.) begin anteriorly with large ostia (Os.) and 
have several convolutions. They open into the cloaca through two 
distinct openings. There is a slight muscular thickening around the 
posterior end of each oviduct just before it opens into the cloaca. 
The kidneys (K.) and ureters (Ur.) are practically the same as 
those of the male. 
The adrenals (Ad.) were present on each side as golden yellow 
bodies lying imbedded in the folds of the peritoneum which sup- 
port the ovaries. The left adrenal was divided into lobes. 
5. Eumeces guttulatus. 
(a) male. (PL III., fig. 9.) 
The urogenital system of this form is relatively large and bulky, 
and fills almost the entire posterior third of the body cavity. The 
specimen examined was an old alcoholic museum specimen that 
measured 5cm. from the tip of the snout to the anus. 
The testes (T.) are large and lie close to the dorsal wall of the 
body cavity just anterior to the kidneys. In fact, the posterior ends 
of the testes and the anterior ends of the kidneys overlap for a 
