INTESTINAL TEACT OF MAMMALS. 



451 



Bettongia cuniculus shows a pattern essentially similar, but both the ceecum and the 



hind-gut are relatively shorter and wider. 



Fig. 7. 



Intestinal Tract of Bettongia penicillata. 

 Letters as in fig. 5. 



Petroyale penicillata, of which I examined a foetus, was almost exactly like Bettongia 

 penicillata, but Meckel's tract was relatively longer. 



