WOMBAT. 



(A) The mesial or cystic lobe is divided into two por- 

 tions, viz., left and right cystic, by the gall bladder cleft 

 and groove for the cystic duct. The left portion corre- 

 sponds to the intermediate cystic in the triparite cystic 

 lobes, and to the lobns qnadratus in man — the right por- 

 tion being the old right cystic lobe, and is the larger of the 

 two. The cystic lobe is separated from the left lateral by 

 the longitudinal fissure explained above, and from the 

 right lateral lobe by the right lateral fissure. The sides of 

 the cleft are hollowed for the reception of the gall blad- 

 der, and the cleft is prolonged dorsally as a groove for the 

 cystic duct between the right and left portions — the latter 

 of which is greatly narrowed dorsally. The right cystic 

 portion is usually smooth, though it may present some As- 

 suring at the cleft. The smaller left lobe is narrow dor- 

 sally, and one can understand how this latter part might 

 disappear and leave a condition similar to the human 

 liver. A projection may be seen on the right margin of 

 the left part, due to an accommodation effect for the gall 

 bladder. 



(B) Here the cystic lobe as a distinct entity is least 

 marked of all the specimens. We have a distinct lobus 

 qnadratus as the dorsal narrow part of the left por- 

 tion, i.e., old intermediate has become detached, and only 

 measures 1.25 cm. in length, and .5 cm. laterally. Apart 

 from this small portion the fissure for the cystic duct and 

 the longitudinal fissure would be merged very much as 

 in the human liver. 



(0) Here, as on the dorsal aspect, we distinguish the 

 three divisions of the cystic lobe, viz., right, intermediate, 

 and left. For the ventral, two-thirds the right and inter- 

 mediate portions are of almost equal size, but dorsally 

 the intermediate portion is greatly narrowed, so that 

 while laterally at the ventral margin it equals 4 cm., at the 



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