North American Lizards. 
31 
The adrenals (Ad.) were present on each side in the folds of the- 
peritoneum which support the ovaries. 
The large urinary bladder (Yes.) was also present in the same 
relative position as in the male. 
6. Gerrhonotus infernalis. 
(a) male. (PI. IV., fig. 17.) 
The specimen studied was one which had been in alcohol for a 
considerable length of time, and measured from the tip of the snout 
to the anus about 15cm. 
The testes (T.) were small elongated bodies lying close together 
on each side of the vertebral column. Each is supported by a fold 
of peritoneum. The right testicle is placed slightly in front of 
the left. The left testicle measured 10mm. by 2mm. while the right 
one measured only 8mm. by 2mm. 
The spermaducts (Yd.) were relatively simple, not being com- 
plexly wound, and are convoluted only in the immediate region 
of the testes. Along the remainder of their course they undulate 
from side to side. These bends together with the connective tissue 
which holds them together form narrow ribbons which extend from 
the testes back to the urogenital openings in the cloaca. There was 
no distinct seminal vesicle present, but observations on other species 
leads me to believe that this may be present during only certain 
times of the year. There was however a gradual enlarging of the 
spermaducts as they approach their posterior openings. Each sper- 
maduct joined with the corresponding ureter and the two had a com- 
mon opening out into the cloaca on one of the papilla-like projec- 
tions of the dorsal wall of the cloaca. 
But the most peculiar character of the urogenital system of Ger- 
rhonotus is the general appearance of the kidneys. They are large 
conspicuous bodies lying in the posterior portion of the abdominal 
cavity, almost filling the posterior third of it. Each kidney (K.) 
is made up of a large anterior lobe and several small posterior lobes. 
The anterior lobe is flat, bean-shaped, and its anterior median edge 
is divided so as to form secondary lobes, but these are not marked 
off as plainly as the larger divisions. The branchings of the ureter 
(Ur.) upon this larger anterior lobe gives it a peculiar fan-like ap- 
pearance. The remainder of the kidney is composed of eight smal- 
ler lobes, which gradually grow smaller toward the posterior end 
of the kidney. The entire kidney is placed in front of the anus, 
none of it being posterior to the opening of the ureter into the 
cloaca. 
The ureters (Ur.) are very much branched. The main branches 
