PHYLOGENY OF THE FALMOQSATRM AND NEOGNATILE. 



251 



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

 the proportions of the alimentary canal : — 



llhea macrorhyncha, 2 



ItJiea americana 



13 1) + ' ■ • ' 



(young) 

 Struthio camelus, 2 • • ■ ■ 



)) )) +■ • • < • 



2 



6 



d 

 2 



Casuarius unappendiculatus, 2 

 ., casuarius beeedrii, 2 



,, pieticollis, 6 



,, bicarunculatus 



,, bennetti, cf 



Dromceus novce-hollandice 



Apteryx australis 



„ oweni, J 



Small intestine. ' Large intestine. 



ft. 

 4 



4 

 4 

 5 

 3 

 10 

 4 

 3 



]QS. 



2 



4 



5| 



5 







6 



3 



9 



8 



5 



10 



23 



1 



23 



4 



23 







24 



6 



23 







28 



6 



3 



8 







o 



10| 



6 

 4 

 4-1 



1 

 1 



1 

 1 



2 



1 



32 

 30 

 29 

 31 

 24 

 33 



1 



1 



1US. 







11 



4 



8 

 2 



4 

 9 



8 

 8 



2 

 10 





 10 







111 



H 



ft. 



i 



2 

 2 



C'ajca. 



ins. 



41 

 9 

 

 4 



8 







8 

 10| 



7 



8 

 10 



7 



4 * 



4J- 



4 

 7 



3| 



5 



7 

 7 



ft. 



1 



ins. 



9 



2 9 



8 

 11 



33 



The Livee. 



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

 Neognathce in that it is divided into two lobes. 



In Casuarius and Dromceus the right lobe is larger than 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 Rhea the right and left liver-lobes are equal in size. The gall-bladder is 

 generally wanting. 



