CROW: TREMATODES OF KANSAS SNAKES. 131 



teriorly in a serpentine course to near the hinder end of the 

 body. Here it turns and passes ventral to the descending limb 

 to the branching of the intestinal casca, and then diagonally 

 to the genital pore. No metraterm is developed. The eggs 

 with which the uterus is filled are .032 millimeter long and 

 .016 millimeter wide. 



The yolk glands are a number of rounded or elongated 

 bodies, averaging about .04 millimeter in diameter, lying in 

 two groups on each side of the body. One group on each side 

 lies lateral and mainly anterior to the respective testis. The 

 other group is situated at the anterior edge of the acetabulum, 

 mainly ventral and lateral to the intestinal cseca. There are 

 about fifteen bodies in each group. A duct from the anterior 

 group meets one from the posterior group and form the trans- 

 verse duct on each side. These join near the ovary, and form 

 the common yolk duct which enters the ootype. 



Specific diagnosis of Renifer acctabularis: Elliptical, semi- 

 cylindrical worms, 1.56 millimeters long and .62 millimeter 

 wide; body covered with short spines. Suckers very large 

 and sessile; oral sucker subterminal, .286 millimeter in length 

 and .241 millimeter in width ; acetabulum circular, .453 milli- 

 meter in diameter, and in center of ventral surface. No 

 oesophagus ; pharynx and intestinal c£eca moderate ; latter with 

 many shallow outpouchings ; reaches to posterior end of 

 middle third of body. Excretory vesicle very large, Y-shaped ; 

 crura extend almost to pharynx. Testes two small, slightly 

 lobate bodies in posterior third of body, in same transverse 

 plane, behind ovary and acetabulum. Ovary immediately 

 dorsal to acetabulum, nearly spherical, and moderate in size. 

 Uterus voluminous, extends to near posterior end of body. 

 Genital pore to left of oral sucker on ventral surface. Egg 

 .0321 millimeter long, .0162 millimeter wide. No ootype, 

 Laurer's canal or receptaciiltim scminis seen. Cirrus-sac large, 

 encloses cirrus, pars prostatica and vesicular seminalis; yolk 

 glands in two groups on both sides of body. Parasite in mouth 

 of Natrix rhombifera. 



Renifer kansensis sp. nov. 

 Several specimens of this worm were found attached in the 

 mouth of Ancistrodon contortrix — the copperhead snake. It 



8— Univ. Sci. Bull., Vol. VII. No. 4. 



