WOMBAT, 



the remains of the left lateral fissure. The larger fissure r 

 which here separates the mesial or cystic lube from the 

 left lateral lobe, represents the mesial or cystic fissure 

 separating the intermediate cystic from the left cystic 

 lobe. In B, however, unification is a more prominent 

 feature; the fissure on the left (i.e., old left lat. 

 fissure) measures 1.5 cm., and the fissure dextral 

 to that — connected with the suspensory ligt. — only 

 measures 1.75 cm. In C we see a much more primitive 

 type of liver. The three portions of the mesial or cystic 

 lobe are defined. The left lateral fissure between the left 

 lat. and left cystic lobes is 6.5 cm. long, and the mesial or 

 cystic fissure between the intermediate and left cystic is 

 4-5 cm. long, so that only 2 cm. exists between the dorsal 

 extremities of these fissures and the inf. v. cava. 



Mesial or Cystic Lobe. — A. — This is separated on the 

 right from the right lateral lobe by a curved fissure — 

 completely through hepatic tissue — measuring 5 cm. long. 

 Between its left extremity and the vena cava 2 cm. of 

 hepatic tissue is found, so that the cystic and right lateral 

 lobes arc also linking up. The mesial lobe measures 11 

 cm. dorso-ventrally, and 7 cm. laterally, and is charac- 

 terized by the presence ventrall} 7 of a somewhat quadri- 

 lateral cleft for the gall bladder, 4 cm. dorso-ventrally, 

 and 1.5 cm. laterally, and so the gall bladder is seen on 

 this aspect. The ventral margin of the liver is formed 

 partly by the mesial and partly by the left lateral lobes. 



B. — Here the right lateral fissure is only 2 cm. long, 

 and the gall bladder cleft measures 2 cm. dorso-ventrally, 

 and .75 cm. across. 



C. — As stated above, the three portions of the mesial 

 or cystic lobe, viz., left, intermediate, and right are well 

 defined. There is a greater definition of the cystic from 



42 



