CHORD AT A. 183 



Order 3. Carinatce. Wings well developed, sternum with a keel. 



Odontormae, biconcave vertebrae, teeth in sockets. Ichthyornis 

 from the Cretaceous. 



Urinatores, wings short, sickle-shaped. Aptenodytes. Podi- 

 ceps. Alca impennis, exterminated. 



Longipennes, beak hooked. Diomedea exulans, albatross. Pro- 

 cellaria Lams. 



Steganopodes, with webbed feet. Pelecanus onocrotalus. 



Lamellirostres, edges of the beak with horny plates. Cygnus 

 olor. Anser. Anas boschas. 



G r a 1 1 ae, palate schizognathous. Scolopax. Grus cinerea. 



Ciconiae, Ardea cinerea. Ciconia alba. Ibis mbra. Otis 

 tarda. 



E a s o r e s, gallinaceous birds. Tetrao. Perdix. Gallus bankiva. 

 Pavo. 



Columbae (Gyrantes), doves. Columba livia. Didus ineptus, 

 exterminated. 



Raptores, birds of prey. Strix. Vultur. Falco. Aquila. 



Passeres, special muscle to the syrinx. Fringilla coelebs. Alauda. 

 Hirundo. Sturnus. Corvus. Paradisea. 



Macrochires. Caprimulgus. Cypselus apus. Trochilus co- 

 lubris. 



P i c i, tongue slender and extensible. Picus. 



Levirostres (Coccygomorphae) palate desmognathous. Cuculus 

 canorus. Buceros. Upupa epops. 



P s i 1 1 a c i, upper jaw hinged on the skull. Psittacus erithacus. 

 Nestor. Strigops, no keel to sternum. 



