86 



COPE 



The families belonging to these orders are the following : 

 Struthiones ; Struthionidee (ostriches), Rheidee, Casuariidas, 



DromaBidse, Dinornithidse (Fig. 31), iEpiornithidae. 

 Apteryges ; Apterygidae (kiwis). 

 Gastornithes ; Gastornithidfe. 

 Crypturi ; Crypturidse (tinamus). 



Of the above families the Struthionidiu are remarkable 

 in having the pubes forming a ventral symphysis. The 

 Rheidfe are equally remarkable in having a ventral sym- 

 physis of the ischia. The geological range of these orders 

 is as follows : 



Plistocene 



Neocene 



Eocene 



Cretacic 



Jurassic . 



Triassic . . 



Carbonic 



Devonic 



Siluric 



Ordovicic 



Cambric . 



Huronic 



Gastornithes 



Crypturi 



