25 



[anatinjs. 



GENUS I. TADORNA. 



Ext. Char. Pedes digitis posterioribus non lobatis, unguibus robustis armatis. Tarsi 

 robusti et longi. Rostrum mediocre validum recurvatum. Lamella vix elongatae. Nares ovales, 

 magnae, in dimidio basali rostri positae. Cauda rotundata. 



Anat. Char. Trachea tubula eequali, sed ad larynginem inferiorem paululum expandente 

 et tunc contracta. Larynx inferior duabus osseis bulbis utrinque, et antice extendentibus. 



Ext. Char. Feet with the posterior toes not lobated, armed with thick claws. Tarsi 

 thick and long. Bill moderate strong. Lamella scarcely elongated. Nostrils oval, large, placed 



in the basal half of the bill. Tail rounded. 



Anat. Char. Trachea with the tube of equal size, but a little expanded and again con- 

 tracted towards the inferior larynx. The inferior Larynx with two osseous bulbs extending on 

 each side and before. 



Anas. Linn. Gmel. Lath. 



Tadorna. Leach. Flem. Steph. 



Typk. Tii dm- mi Bellonii. 



The depth of the keel to the length of the sternum is as 1 to 4. The breadth of the pelvis 

 to its length as 1 to lg. The length of the sternum to that of the tibia as 1 to 2. The breadth 

 of the cranium to its length as 1 to 2j ! . 



