WOMBAT. 



Notes on Liver of Wombat. 



Specimen E, 



In this specimen I was struck by the large relative 

 size of the left and mesial lobes compared with the right 

 lobe. 



The measurements were : — 



Laterally. Dorso-ventrally. 

 Right Lobe 7 cm. . . 5 cm. 



Mesial .... 16 cm. . . 13 cm. 

 Left Lobe . . 13 cm. . . 15 cm. 



In this large specimen interesting light is thrown on 

 the evolution of the mesial lobe in Phascolomyidae. 



Visceral Surface. — -The small right (lat.) lobe, large 

 left (lat.) lobe, and the mesial or cystic, consisting of two 

 main divisions, were all distinguishable — the left lobe of 

 the mesial being mainly occluded, however, by the left lat. 

 lobe, which projected as far dext rally as the visceral sur- 

 face of the right mesial. The lower part of the original 

 left mesial has fused to the left (lat.) lobe, an irregular 

 depression being between the two. The left mesial now 

 consists of the upper original part of the left mesial and 

 the lower part of the intermediate mesial, only a partial 

 Assuring being between the two. This left mesial is 

 separated from the left (lat.) lobe by the original left lat. 

 fissure above, and the remains of the mesial or cystic fis- 

 sure below, and as will be seen on the diaphragmatic sur- 

 face, the upper part of the intermediate mesial or cystic 

 lobe (lobus quadratus) has almost disappeared. 



Diaphragmatic Surface. — Between the mesial and 

 right lobes is the complete right lateral fissure. (Not 

 shown in the diagram.) It measures 6.5 cm., and between 

 its dorsal extremity and the inf. v. cava are 5 cm. of 



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