Passefes 



Catharles iFalcones 

 Steganopodes 



Ciconii 



SpYienisci 

 Colymbi 



Casuari 



Struthiones' 



RhinochBclus 

 ThJnj^Eurypyga^^ Psophia ^Otides 



Alectoropodes 

 Perisleropodes 



■Pro Aves 

 III. 15.— Phylogenetic Tree of Descent 



