186 



MR. W. A. FORBES ON THE KOALA. 



[Jan. 18, 



The bile- and pancreatic ducts open into the duodenum 2| inches 

 from the pylorus. The pancreatic duct is dilated terminally into a 

 vesicle, which does not receive the bile-duct, the latter opening 

 alongside the former into the intestine. 



Fig. 1. 



Liter of Koala, from above ; three fifths the natural size. 



though small, are quite distinct. The livers of Belicleus sciureus and B. hrevi' 

 cf.ps, Acrobata pygnKsa, and Dromicia (nana?), though differing among them- 

 selves considerably in the relative degree of development of their constituent 

 lobes, all agree in having a distinct and free caudate lobe, as vcell as a Spige- 

 lian, and in no system of secondary sulci attaining any degree of development. 



In Phascolmnys wombat the left lateral lobe is the largest ; the right central 

 is also large ; but the left central is very small, as is the right lateral fissure. The 

 umbilical fissure is distinct, as is the cystic fissure, which allows the gall- 

 bladder, which reaches to the anterior margin of the liver, to appear super- 

 ficially. There are no distinct caudate or Spigelian lobes, though the former 

 is indicated. There is a tendency, particularly on the left lateral and right 

 central lobes, to develop accessory sulci. As in the Koala, too, the small right 

 lateral lobe is pointed below. 



