242 DR. H. GADOW ON THE [Mar. 15, 



I. Cathart^. 



Neotropical. 



Oil-gland nude. Neck without apteria. 



Nares pervious. 



Aftershaft absent. 



Basipterygoid processes articulating with middle of 



pter3'goids. 

 Procoracoid rudimentary. 

 Sternum with two pairs of notches. 

 Hypotarsus with two shallow grooves. 

 Flexors of type V. 

 Syrinx without muscles. 



II. ACCIPITRES. 



Cosmopolitan. 



Oil-gland tufted. Nares impervious. 



Neck with lateral apteria. 



Procoracoid process large. 



Sternum with one pair of notches or fenestras. 



Flexors of type III. 



Syrinx with tracheo-bronchial muscles. 



1. Vulturidce. 



15 cervical vertebrae. 

 No basipterygoid processes. 

 Aftershaft present. 

 Coracoids present. 



2. Gypogeranidcs. 



15 cervical vertebrae. 

 Basipterygoid processes present. 

 Aftershaft present. 

 Coracoids separate. 



3. Pandionidce. 



14 or 15 cervical vertebrae. 

 Basipterygoid processes absent. 

 Aftershaft absent. 

 Coracoids overlapping. 



4. Falconidce. 



14 cervical vertebrae. 

 Basipterygoid processes absent. 

 Aftershaft present. 

 Coracoids separate. 



12. ANSERIFORMES. 



Cosmopolitan. Aquatic. Nidifugous. 



Young downy. 



Neck long, without apteria. 



