AUSTRALIAN PHALANGEKS. 



Mesial or Cystic Lobe.— The three divisions are all 

 visible on this aspect, and the lobe is freely separable from 

 the right and left lateral lobes. The intermediate por- 

 tion, like the left lateral, may sometimes be prolonged as 

 a saddle-flap portion. The right lateral fissure, as well 

 as the mesial or cystic fissure between the intermediate 

 and left cystic portions, are traceable to the portal in- 

 terval, The right and left lat. fissures are complete 

 from the dorsum to ventrum, but the cystic fissure is only 

 partially through the substance. The gall bladder cleft 

 between the middle and right portions is well defined, and 

 the margins are hollowed out for the reception of the gall 

 bladder, and to further accommodate the latter a projec- 

 tion is thrown forwards on the inner side of the inter- 

 mediate portion, and between this and the right cystic is a 

 depression for the cystic duct. 



Right Lat <ral Lobe. — Two main portions are seen- 

 the dorsal being the right lateral, and the ventral the 

 caudate. In the former Assuring is usually noted about 

 the middle and lower part. The caudal part forms, with 

 the lobus caudatus. the concavity for the upper part of 

 the right kidney. 



The Caudate Lobe can be freely raised from the right 

 lateral. It presents three surfaces, viz., dorsal for the 

 right lateral — caudal for the kidney — and ventral for the 

 pyloric sphincter and beginning of the duodenum. It 

 measures 1.5 cm. dorso-ventrally, and 2.6 cm. lat. 



Spigelian Lobe.--This is seen projecting from the 

 inner side of the right lat. lobe and the caudate, below the 

 left lat. lobe. It has a pointed extremity, is somewhat tri- 

 angular in shape, and measures 1.25 cm. long. It lies 

 dorsal to the lesser omentum. Passing in a depression 

 between the spigelian and caudate lobes are the common 



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