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



IV. DiCHOLOPHI. 



Neotropical. 



No cervical apteria. 



Oil-gland nude. 



Scliizognathous. Holorhinal. 



14 or 15 cervical vertebrae. 



Sternum with two posterior notches. 



Hypotarsus simple. 



V. Oxides. 



No cervical apteria. Downs of adults only on apteria. 



(^Unique among Gruiformes.) 

 Schizognathous. Holorhinal. 

 Sternum with four posterior notches. 

 Hypotarsus complex. Hallux absent ; feet cursorial. 



16. CHARADRIIFORMES. 



Cosmopolitan. Nidifugous. 



Downs of adult on pterylae and on apteria. 



With lateral cervical apteria. Aftershaft present. 11 



primaries. 

 Oil-gland tufted. Aquinto-cubital. 

 Schizognathous. Nares pervious. 

 Rhamphotheca simple. 



15 cervical vertebrae (except (Edicnemus and Parridce). 

 Coraco-humeral groove distinct. 

 Furcula with hypocleidium. 



Peri-orthocoelous, with mesogyrous tendency ; type I. 

 Flexors of type I. or IV. 



I. LlMICOL^. 



Downs of young very simple, brush -like. 

 Hypotarsus with canals. 

 Front toes webbed. 

 Supraorbital glands variable. 



1. ChionididcB. 



Antarctic. 



Schizorhinal. No basipterygoid processes. 

 Vomer broad. Rhamphotheca complex. (^Unique 

 among Charadriiformes.) 



2. CharadriidcE. 



Cosmopolitan. 



Schizorhinal. With basipterygoid processes. 



a. Charadriince. 



b. Scolopacince. 



