54 ANATOMY, OF A CHELONIAN. 



b. Entering through a fissure on -the outer edge 

 of the kidney, between two of its lobes, the 

 reni-portal vein. Trace this back through the 

 muscles of the groin-hollow to the point up to 

 which it has already been dissected (8i). 



c. A branch entering through another fissure, 

 placed farther forward on the outer margin of 

 the kidney. This vein comes from the lateral 

 regions of the posterior part of the carapace. 



d. Farther forward, and in still another fissure, a 

 vein which proceeds from the passage along- 

 side the vertebral centra, which is arched over 

 by the necks of the ribs. 



134. Now, replacing the testis and epididymis, find 

 the posterior vena cava, lying on the muscles in front of 

 the vertebral column and beside the dorsal aorta. Fol- 

 low it forward until it enters the right lobe of the liver, 

 and then, cutting away the hepatic tissue, trace it up to 

 the venous sinus, receiving the right hepatic veins on its 

 way, and also the right anterior abdominal vein. 



135. Next trace the vein back, turning aside the re- 

 productive organs where they come in the way and also 

 tearing through the bands of peritoneum slinging them. 

 The vessel will be seen to commence opposite the kid- 

 neys by the union of several renal veins, with branches 

 from the testes and epididymes. 



136. Cut away the left testis and epididymis, and 

 clean the ventral surface of the kidney of the same side. 

 The gland will be seen to be lobulated, and to present 

 externally the appearance of being made up of a greatly 



