MORPHOLOGia.^ CLASSIFICATION. 



Class. 



AVEStBIRDS. 



Tail longer than body. 



Tail shorter than hody. 



Subclass. 



Order. 



Suborder. 



(!•) SAURUR.S. 

 Sternum with keel. 



(II.) RATIT.ffi. 

 Sternum devoid of keel. 



(in.) CABmAT.£. 

 sternum with a keel. 



Wing with long humerus and 

 with two ungual phalanges. 



Wing with rudimentary or 

 very short humerus and with 

 not more than one ungual 

 phalanx. 



Vomer broad behind. 



(A) 



lachia free and pubes Ischia uniting immedi- No hind toe. A hind toe. 

 uniting in a ventral ately beneath sacrum and 

 symphysis. pubes free. 



Vomer narrow behind. 

 (B) 



(a) Maxillo-palatines free. 



(P) Maxillo-palatiues arrested, (y) Maxillo-palatines united 



(i. ) Vomer pointed in front, (ii.) Vomer trnncated in front. 



(A) 

 DROM/EOGNATH/E. 



(B) 

 SCHIZOGNATH/E. 



"Cleft "palate. 



(0) 

 ^EGlTHOGNATHiC, 



(iii.) Vomerine halves per- 

 manently distinct. 



(D) 

 SAUROGNATHiE. 



(iv. ) Vomer abortive or small 

 when existent, always slender 

 and tapers in front. 



DESIVIOGNATH>E. 



Family. 



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Genus. 





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