28 
Transactions Texas Academy of Science. 
The ureters (Ur.) are tubes which run across the ventral faces of 
the kidneys, giving off: branches at regular intervals which pass into 
the kidneys. The ureters join the corresponding spermaducts and 
open with the latter on two small papillae in the cloaca. 
Only one adrenal (Ad.) was found, and was a golden yellow body 
imbedded in the windings of the spermaduct near the anterior end of 
the left kidney. 
(b) female. (PI. III., fig. 12.) 
The ovaries (Ov.) are small bodies almost exactly symmetrically 
placed on each side of the vertebral column close to the dorsal wall 
of the abdominal cavity. They are supported as usual by two mesen- 
teries. 
The oviducts (Ovd.) are large tubes which begin anteriorly with 
a large slit like ostium (Os.) and continue posteriorly until they 
open into the cloaca through two distinct openings. The right ovi- 
duct is without any convolutions and is almost straight. The left 
one though not looped on itself, is thrown into wave like folds, the 
lines of whose crests run perpendicular to its long axis: that is, 
the winding is dorsal-ventral rather than from side to side. 
The kidneys (K) and ureters (Ur.) are practically like those of 
the male. 
The adrenals (Ad.) were present as golden yellow bodies em- 
bedded in the folds of the peritoneum which support the ovaries. 
Another species of this same genus was also dissected, namely 
Crotaphytus wizlizenii, and showed approximately identical struc- 
tural relations. 
4. Phrynosoma sp. 
(a) male. (PI. III., fig. 11.) 
The exact species was not determined, a small, light colored form 
from Brewster County, Texas. The specimen dissected measured 
4cm. from the tip of the snout to the vent. 
The urogenital system is relatively bulky, and fills almost the 
whole of the posterior portion of the abdominal cavity. 
The testes (T.) are relatively large bodies placed on each side of 
the vertebral column about midway between the mouth and anal 
opening. Each measured about 5mm. through the greatest diame- 
ter. The left one was placed slightly posterior to the right. 
The spermaducts (Vd.) were complexly convoluted in the region 
of the testes. They arise from about a half dozen collecting tubules, 
which come out from the dorsal sides of the testes. They widen con- 
siderably near the anterior ends of the kidneys, and then run with 
a few curves across the latter, each swelling into a small seminal 
