SYSTEM OF CLASSIFICATION OF ORDERS, SUB- 

 ORDERS AND FAMILIES ADOPTED 

 IN THIS WORK 



CLASS AVES. 

 Sub-Class Ratitae. 



Order RHEIFORMES. 

 Family Rheidae Rheas. 



Sub-Class Carinatae. 



Order TINAMIFORMES. 

 Family Tinamidae Tinamous, etc. 



Order GALLIFORMES. 



Suborder Penelopes. 

 Family Cracidae Currassows and Guans. 



Suborder Phasiani. 

 Family Phasianidae Pheasants. 

 " Meleagridae Turkeys. 

 " Tetraonidae Grouse, Ptarmigans, etc. 

 " Odontophoridae Quails, etc. 



Order Columbiformes. 

 Suborder Columbae. 

 Family Columbidae Pigeons and Doves. 



Order OPISTHOCOMIFORMES. 

 Family Opisthocomidae Hoatzins. 



Order Ralliformes. 



Family Rallidae Rails, Gallinules and Coots. 

 " Heliornithidae Heliornis. 



Order PODICIPEDIFORMES. 

 Family Podicipedidae Grebes, 

 ii 



