PHYLOGENY OF THE PAL^EOGNATILE AND NEOGNATH^E. 



Kg. 2. 



155 



A. 



B. 



5-rVf. 



.. >... 



D. 



E. 



A. — Left foot of a nestling Casuarius casuarius selateri, to show the arrangement of the scutes of the podotheca. 



B. — Left foot, anterior aspect, of Casuarius lorice, for comparison with A, to show the large hexagonal 

 plates clothing the proximal portion of the tarso-metatarsus. 



C. — Left foot of a newly hatched Dromaus novai-hollandia?, to show the arrangement of the scutes of the 

 podotheca, and the curious continuation of the pattern of coloration of the body down to the toes. 



D. — Left foot of a ripe embryo of Rhea americana, to show the arrangement of the scutes. Note the presence 

 of feathers (/) on the tarso-metatarsus — temporary in this species, permanent in R. darwini. 



E. — Left foot of an embryo Apteryx australis manlelli, to show the form of the scutes of the podotheca. 



