WOMBAT. 



down within what may be regarded as the head of the 

 pancreas parallel, and to the left of the common duct. 

 About 3-4.5 cm. from the termination of the latter the 

 pancreatic duct comes into close relation with it, be- 

 coming adherent to its wall, although it can be separated 

 by careful dissection right down to the intestine. 



As the wall of the pancreatic duct is thinner than that 

 of the common duct it can be easily torn. It finally ter- 

 minates with the common duct at the summit of a well 

 defined papilla in the interior of the duodenum, which lies 

 about 14-16 cm. from the pyloric sphincter. From this 

 papilla a probe can be passed directly into either the 

 common or the pancreatic duct. The common duct is 

 usually about twice the size of the pancreatic duct. 



Lesser (Gastro-Hepaiic) Omen turn. — The right mar- 

 gin is defined on account of the comparative dorsal fixa- 

 tion of the right pancreas, whilst the left margin is more 

 defined than in the other Marsupials. It is for the most 

 part attached above to the portal fissure, and is traced on 

 the left to the oesophagus, lying dorsal to the mesial pro- 

 jection on the inner margin of the left lateral lobe. 



Portal Vein. — The first branch is a well defined 

 branch on the right to the right lateral lobe. More ven- 

 tral is a large branch, on the left, to the left lateral lobe. 

 Finally, two smaller branches are noted, one on right to 

 the light mesial, and one on the left, to left mesial and 

 ventral part of the left lateral lobes. 



Pancreas. — Of all the Marsupials and Monotremes 

 the pancreas of the Wombat is the one that most re- 

 sembles the human type. A head, body, and, in many 

 cases, a tapering left portion, or tail, may be dis- 

 tinguished. It is compact, and extends from the duo- 

 denal loop on the right to the spleen on the left side. The 



57 



