AUSTRALIAN PHALANGERS. 



limited interval about 1.5 cm. between the colon 

 and the first part of duodenum, extending as far 

 to the left as the right limitation of great omentum. On 

 one occasion I traced some strands of pancreatic tissue 

 in lesser omentum up to the portal interval. Just above 

 the duod-intest. junction, where it is fixed dorsally, the 

 pancreas is seen passing to the left towards the spleen as a 

 compact piece coming into relation with the lesser sac 

 (great omentum), the lower dorsal boundary of which it 

 forms, and strands of pancreatic tissue may even be sent 

 on to the lesser sac. The pancreas is finally found to be 

 outside the lesser sac in relation with the small left process 

 of the spleen and the lieno-mesocolic fold connecting left 

 process of spleen, kidney, and mesocolon ; not being found 

 in relation with the body or right anterior process. At its 

 termination on the left at the spleen, in those cases where 

 its character was diffuse on the right, it becomes more 

 compact. The greatest length of the pancreas in the 

 phalanger is about 6 cm. 



Pancreas in Pseudochirus. — In Pseudochirus the 

 pancreatic tissue is relatively greater in amount than in 

 Trichosurus. A well defined piece is found about the duct 

 entrance (to the left of which a small process is seen), and 

 this is continued down to the duodenal loop closely 

 attached to the duodenum, strands even extending to the 

 extremity of the loop. These are all in the meso-duo- 

 denum. The pancreas passes thence from the meso-duo- 

 denimi to the left by processes running in two directions, 

 which are best seen by throwing up the colon on to the 

 liver. One of these — the larger— is anterior or ventral, 

 and lies between the colon and stomach, being within the 

 lesser sac, and is traced outwards on the left in relation 

 with the anterior right process and body of the spleen, 

 and comes in relation with the "gastro-splenic" omentum. 



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