CROW: TREMATODES OF KANSAS SNAKES. 133 



caeca, and passes diagonally to the gential pore at the left side 

 of the body. The resiciila seminalis makes a spiral bend in the 

 posterior end of the cirrus-sac and nearly fills that part. A 

 short pars prostatlca follows, then the cirrus continues through 

 the cirrus-sac. The end of the cirrus protrudes a short dis- 

 tance. 



The ovary is a small, round organ, .22 millimeter in diameter, 

 which lies partly behind and dorsal to the acetabulum. It is 

 dorsal in position and just to the right of the median line. The 

 short oviduct passes toward the median line and enters the 

 ootype, which lies in the midst of the shell gland. The shell 

 gland lies to the left and slightly dorsal to the ovary. No 

 reccptaculitm seminis or Laurer's canal are present. The yolk 

 glands consist of about fifty small, irregular-shaped bodies on 

 each side of the body. They are lateral and mainly ventral to 

 the intestinal cseca, and extend over a little more than the 

 middle third of the body. Several small ducts from each gland 

 join to form the lateral duct, which proceeds toward the me- 

 dian line, where it meets its fellow. The common yolk duct 

 thus formed passes anterior a very short distance and joins 

 the ootype on the posterior side. The uterus is a very volu- 

 minous organ. It consists of a descending and an ascending 

 limb, both of which have a serpentine course. The descending 

 limb passes from the ootype along the median line to near the 

 hinder end of the body. The ascending limb proceeds forward 

 between the testes to the branching of the intestinal cseca, 

 where it passes ventral to the left one to the genital pore at 

 the left side of the body. There is no specialized metraterm. 

 The ascending limb is several times larger than the descending, 

 and fills about half of the body cavity behind the testes. The 

 uterus is filled with eggs, which measure .045 millimeter by 

 .019 millimeter. 



The following is a specific diagnosis of Renifer kansensis: 

 Small, elongated, semicylindrical worms, 4.56 millimeters long, 

 1.18 millimeters wide, and .387 millimeter thick. Body covered 

 with short spines. Oral sucker subterminal, .392 millimeter 

 long and .356 millimeter wide. Acetabulum sessile, .453 milli- 

 meter in diameter. The pharynx is small ; oesophagus moder- 

 ate; intestinal cseca simple tubes, which reach to middle of 

 body. Excretory vesicle voluminous, Y-.shaped, with many 

 outpouchings in median portion ; crura and median portion 



