244 DR. H. GADOw ON THE [Mar. 15, 



Furcula with hypocleidium. 



Plagioccelous, type V. Caeca large. Crop globular. 



10 primaries. 



I. TXJRNICES. 



14 or 15 cervical vertebrse. 

 Schizorhinal. 



Sternum with long and simple posterior lateral pro- 

 cesses. 

 Procoracoid process large. 

 No spina externa sterni. 

 Coracoids separate, 



Hypotarsus complex. Hallux very small or absent. 

 Flexors of type IV. 

 Neck with lateral apteria. 

 Oil-gland tufted. 

 Qninto-cubital. 



II. Galli. 



16 or more cervical vertebrse. 



Holorhinal. 



Coracoids touching each other. 



Flexors of type 1. Hallux large. 



Neck without lateral apteria. 



1 . Gallidce. 



16 cervical vertebrse. Nidifugous. 



Spina communis sterni. 



Sternum with long posterior lateral processes and 



with oblique processes. 

 Hypotarsus complex. 



2. Opisthocomidce. 



18 or 19 cervical vertebrse. Nidicolous. 



Spina externa only present. 



Sternum with small notches or fenestra only ; 



no oblique process. 

 Oil-gland tufted. 



15. GRUIFORMES^ 



Cosmopolitan. Aquatic or paludic. 



Angulare mandibulae truncated. Rhamphotheca simple. 



^ Owing to the existence of such peculiarly specialized forms as EiiTypyga, 

 EMnochetiis, Podica, Dicholophus, and Otis (all of which are most intimately 

 related to the bulk of the Grues and Ealli), it is not possible to admit some 

 important characters into the diagnosis of the Gruiformes. They all are abso- 

 lutely nidifitgons with the exception of Eurypyga and Heliornis (the young of 

 Bhinochetus are unknown). They are typically schizogiiathous, except Ehiiw- 

 chetus and Bicholophus. They have a tvfted oil-gland except Bhinochetus, 

 Eunjpyga, Dicholo'phus, and Otis. They have lateral cervical apteria except 

 Eurypyga, Bicholophus, and Otis. Their feet are those of Waders, except the 

 tridactyle cursorial Otis. Bhinochetus alone has impervious nares. 



