590 ON SOME ABNORMALITIES IN THE CARNIVORA. 



atrophies, and the blood is conveyed entirely to the vein of the 

 right side. The part of the right anterior cardinal vein between 

 the cross vein and the sinus venosus becomes the precaval vein of 

 the normal animal. 



I believe that the persistence of two precaval veins in this 

 animal is due to the non-formation of the cross vein. 



No abnormality was found in the postcaval vein. 



The veins of the father of this animal were quite normal. 



Abnormalities in the Vertebral Veins of a Badger (text- 

 fig. 65 B). 

 The left vertebral vein bifurcates in the lateral triangle of the 

 neck ; one of the divisions opens into the left external jugular 

 vein, and the other one opens into the left innominate vein. 



The right vertebral vein runs posteriorly dorsal to the right 

 subclavian vessels, collects the veins from the first and second 

 right intercostal spaces, and opens into the precaval vein. 



