540 



ANATOMY OF VERTEBRATES. 



Kangaroos, Potoroos, most Phalangers (Phal. Cookii is an excep- 

 tion), most Petaurists (Pet. Sciureus is an exception), the Opos- 

 sums, Bandicoots, and Phascogales, the ulnar and larger division 

 of the brachial perforates the internal condyle of the humerus ; it 



422 



Branches of the abdominal aorta, Kangaroo. 



passes over that condyle, impressing it with a more or less deep 

 groove in the Dasyures and Thylacine. 



In the abdomen, the primary branches of the aorta are sent off 



