734 



Comparative Morphology of Chordates 



Fig. 539. Wallaby, one of the kangaroo family (Macropodidae). (Courtesy, Ameri- 

 can Museum of Natural History, New York. I 



Fig. 540. Wombat, Phascolomys. (Courtesy, Flower and Lydekker: "Introduction 

 to the Stud} of Mammals," London, A. & C. Black, Ltd.) 



