200 



MR. P. E. BEDDARD ON THE 



Text-fig. 69. 



[Feb. 19, 



Az.r. 



Azj'gos of Crossarclms ohsciirus. Lettering as in text-fig. 62. 



entered the subcla^dan vein. The corresponding vein of the left 

 side of the body was formed of two affluents arising from the first 

 two intercostal spaces, which opened into the precaval and not into 

 the subclavian. 



(7) Marsupials. 



I am able to give rather a fuller account of the genera of this 

 group than of the other groups of mammals treated of in the 

 present communication. And furthermore, of several genera 

 which I have examined I have had the opportunity of seeing 

 several species, and occasionally more than one example of the 

 same species. The azygos veins of Marsupials have been lately 

 the object of a careful study by Prof. McClure * in connection 

 with a detailed survey of the blood system of the Opossum, 

 Didelphys marsupicdis. He has in his memoir collected together 

 what has been written upon the subject of this vein, and I 

 shall review his conclusions in the light of the additional facts 

 which I am here able to contribute to this branch of anatomy. 



* American Journ. Anat. ii. 1903, p. 371. 



