1905.] 



VASCULAR SYSTEM OF LACERTILIA. 



473 



by its straight as opposed to their highly sinuous course. This 

 applies also to the affluents of the portal, which, so far as concerns 

 the small intestine, are five in number. 



Text-fis-. 63. 



Renal arteries of OpJdsaurus. 

 Ao. Aorta ; A.B. First and last renal arteries ; ep. Epigastric ; Ic. Intercostal. 



The gastric afflvients of the portal trunk arise from both sides 

 of the stomach. On the i-ight side is a vein which runs forward 

 along the stomach to nearly its anterior end, but stops a little 

 before a region of the stomach the veins of which instead of 

 joining the main portal system open independently into the liver ; 

 the arrangement of these veins Avill be considered presently. At 



32* 



