.1908.] 



OF SXAKES OF THE GENUS CORALLUS. 



145 



view of the fact that the vein is, as it would appear, a vein in 

 coui-se of disappeai-ance among the Reptilia. 



Text-fig. 24. 



w.v. 



The liver and certain veins connected with it of Corallus cookii. 

 a., epigastric vein; u.v., umbilical vein; v.e.i., postcaval vein. 



On the whole the azt/gos vein appears to be a more extensive 

 vein among the Boidse than among the Colubrine Snakes. I have 



10* 



