204 



MR. P. B. BEDDARD ON THE 



[Feb. 19, 



but is invariably small, and consists at the most of a short trunk 

 made up of affluents from three intercostal spaces only. There is 

 some diffei-ence in the exa,ct number of these affluents ; there are 

 either two or three or apparently only one. In one example I 

 I'ecorded the further extension backwai-ds of the left vena azygos 

 till it reached the vena cava behind the kidney. This dis- 

 position of the azygos agrees with what has been already recorded 

 by previous observ^ers concerning this species. These previous 

 observations refer to several examples. The state of affairs may 

 therefore with confidence be regarded as characteristic of the 

 species. 



Allied to the Yulpine Phalanger is the Wombat {Phascolomys 

 initchelli) (text-fig. 71), of which I have dissected two examples from. 



Text-fig. 71. 

 p.C. PJ^- 



Azygos veins of Fliascolomys mitchelli. 

 oes. Esophageal vein. Other letters as in text-fig. 62. 



the present point of view. In the first example, a female, two 

 azygos veins were present and about equalled each other in length. 

 The conditions were in fact like those of Macropus ibolccbatus. 



In a second Wombat, also a female, the conditions of the 

 azygos veins were apparently identical. Both veins v.'ere present 

 and well developed ; but the light-hand one was the longer 

 of the two. In front of the two azygos veins no intercostal 



