OBSERVATIONS. 



Multiple Bight-Sided Lobulation in Sarcophilus 



and Koala. 



In these two highly specialized feeders — the one car- 

 nivorous, and the other phyllophagous — extensive right- 

 sided Assuring and lobulation is noted. The effect of 

 this must be to improve the elasticity of the organ. In 

 the Koala we have, as stated, a large proximal colon and 

 caecum dependent from the pyloric region by the mesial 

 band, and this would be advantageous. Possibly also this 

 is a factor in preventing rupture of the organ from in- 

 juries during climbing. On the other hand these causes 

 are not operative in the Tasmanian Devil, and further- 

 more, its intestinal tract is primitive. It is noteworthy, 

 however, that the lobulation and Assuring are most 

 marked in the varieties of liver where the right cystic 

 and right lateral lobes tend to become fused. 



The Spigelian and Caudate Lobes. 



In the Monotremes and the Tasmanian Devil the 

 caudate lobe is well developed, while in the Kangaroo and 

 Wombat it may be regarded as non-existent. In the 

 Monotremes and those Marsupials with a defined caudate 

 lobe (to which may be added the Gorilla amongst pri- 

 mates) the inf. vena cava is not seen on the visceral sur- 

 face. It lies dorsally behind the junction of the caudate 

 and spigelian lobes. In the Kangaroo, Wombat, and Man 

 the vena cava is seen on the visceral surface in its hepatic 

 relationship. In an Orang, three months old, in the 

 Hunterian Museum, there is a well defined caudate lobe. 

 The inf. vena cava, which measures 2.5 cm. in its hepatic 

 relationship behind the caudate and spigelian lobes, is 

 not visible viscerally, and only on diaphragmatic surface 

 for its terminal, .5 cm. In connection with the inf. vena 



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