KANGAKOOS AND WALLABIES. 



left, and the right lat. lobe on the right. It is traced on 

 the right side of the lesser omentum, then behind the 

 pylorus of the stomach, and coming into relation with 

 pancreatic tissue it enters the mesoduodenuin, which is 

 not so defined as in Trichosurus, and finally terminates 

 about the middle of the ascending stem of the duodenal 

 loop, though in two Wallabies I found it entering close 

 to the duod-intest. flexure. The opening into the duo- 

 denum, which is characterized by a slight papillary eleva- 

 tion, and is guarded by a sphincter, lies about 12-14 cm. 

 from the pylorus in Macropus Gig, and about 7-10 cm. in 

 Macropus Ualab. The pancreatic duct, which is usually 

 relatively fine, and can be traced to the spleen on the left 

 above the root of the mesentery, joins the common bile 

 duct 3-5 cm. before its termination in the duodenum. 

 From the entrance of the pancreatic duct to the portal 

 fissure, i.e., common bile duct, is 7-8 cm. The combined 

 hepatico-pancreatic duct is much greater in circumfer- 

 ence than the common duct, and has a thickened somewhat 

 pipe stem feel. In a great Kangaroo I have found the 

 circumference of this portion 2.5 cm., and in two Wal- 

 labies the terminal .5 cm. was bulbous, forming almost a 

 right angle with the main duct before entering the duo- 

 denum. The lumen of the thickened hepatico-pancreatic 

 portion of the duct is narrowed, and the interior rugous. 

 The thickening of the wall suggests greater intra-duo- 

 denal tension than in the other Marsupials. In some 

 specimens a valvular arrangement at the commencement 

 of this portion is suggested. It is interesting to note the 

 presence of a band, 2.5 cm. broad, which passes across the 

 pylorus of the stomach from the right of the lesser omen- 

 tum to the right of the great omentum. The thickened 

 part of the duct usually begins just caudal to this band. 

 This, though adherent slightly to the pylorus, forms a 

 continuity between the colon at the pylorus and the lesser 



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