1916] Chandler: Structure of Feathers 283 
where, according to their epiphyology, they seem to belong. The 
classification as here used is as follows: 
CLASS AVES 
Subclass Neornithes 
I. Ratitae 
Order Struthioniformes 
Rheiformes 
Casuariiformes 
Apterygiformes 
II. Carinatae 
Order Sphenisciformes 
Colymbiformes 
Procellariiformes 
Ciconiiformes 
Suborder Steganopodes 
Ardeae 
Ciconiae 
Phoenicopteri 
Order Anseriformes 
Suborder Anseres 
Palamedeae 
Order Falconiformes 
Suborder Cathartae 
Gypogerani 
Accipitres 
Order Galliformes 
Suborder Galli 
Turnices 
Order Crypturiformes 
Gruiformes 
Charadriiformes 
Suborder Laro-limicolae 
Pteroclo-columbae 
Order Cuculiformes 
Coraciiformes 
Suborder Coraciae 
Striges 
Caprimulgi 
Cypseli 
Colii 
Trogones 
Pici 
Order Passeriformes 
3. Methods of Comparative Study 
In working over the morphology of feathers in each of the above 
eroups, a brief survey of feather structure was made of a series 
