PHYLOGENT OF THE PAL^OGNATH.E AND KEOGNATHtE. 



251 



The following table from Beddard [7] will give at a glance the known variations in 

 the proportions of the alimentary canal : — 



lih.i'u iiuicrorJii/ticJiii, $ 



lUiea mnrrlcaiKt 



(young) 



Struthio camcliis, !J 



? 



„ ? 



I, ,1 c^ 



d 



CasuKfiiis inuq)/)! iiilicnJitlus, 2 

 ., casiicij'iiis hi'iuani, 2 



,, picticulUs, d 



,, hu-iinmcnhtiii.i 



„ hennctt'i, c? 



T)fOincn(f norti-JioUandli 



Ajitcnj.i- ausiridix 



„ oiveii.i, (S 



The Liver. 



The liver, in all the Palceognathce, save Struthio, agrees with that of the 

 Neognatlue in that it is divided into two lobes. 



In Casuarius and Droiiueus the right lobe is larger tlian the left. A Spigelian lobe 

 is represented. 



Both Casuarius and Dromceus possess a gall-bladder. In the former the gall opens, 

 in common with the pancreatic ducts, into a diverticulum on the distal loop of the 

 duodenum. 



In Apteryx the left liver-lobe is larger than the right ; the gall-bladder is occasion- 

 ally absent. 



In Bhea the right and left liver-lobes are equal in size. The gall-bladder is 

 generally wanting. 



