AUSTRALIAN PHALAXGEES. 



to the left as the spleen, opens into the common bile duct 

 1.5 to 2 cm. before it terminates in the duodenum. On 

 opening the duodenum the termination of the duet is 

 defined by a slight papillary projection. After the en- 

 trance of the pancreatic duct the combined hepatic-pan- 

 creatic duct gradually widens, and for the last 1 cm. the 

 circumference is double that of the common bile duct. 

 In Pseudochirus the combined duct lies ventral to the 

 upper pole of the right kidney, to which the meso-duo- 

 denum has become attached. 



Portal Vein. — On the right side a branch is seen pass- 

 ing to the right lateral and caudate lobes. Passing ven- 

 trally a well defined branch is seen passing on the left to 

 the left lateral lobes, and on right to right mesial. It 

 finally terminates in two branches, which are traced to 

 the left mesial and intermediate mesial lobes. 



Lesser Omentum. — The upper or hepatic attachment 

 is short, and is traced from the inf. vena cava exit, dor- 

 sally, where it is continuous with the suspensory liga- 

 ment. It is traced to the ventral surface at the concavity 

 for the oesophagus on the dorso-internal part of the left 

 lateral lobe, and lies along the dorso-int. part of the left 

 lateral lobe, between it and the lobus spigelii, up to the 

 portal fissure. A peritoneal band ventral to the lesser 

 omentum is traced from the under surface of the left 

 hepatic lobe to the lesser curvature, corresponding to a 

 bend in the stomach between right small pyloric and left 

 large cardiac portions. 



Pancreas in Trichosurus. — As in the Platypus, the 

 pancreas may be characterised by its diffuse char- 

 acter. It does not fill the duodenal loop but occupies 

 the portion of the meso-duodenum above the attach- 

 ment of the colon, being chiefly found in the 



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