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[anatinzb. 



GENUS II. CASARKA. 



Ext. Char. Rostrum mediocre lateribus parallelibus non recurvatum. Nares subovales, 

 culminem versus positae. Lamella elongatee. Pedes robusti, digiti unguibus magnis armati. 



Anat. Char. Ignoti. 



Ext. Char. Bill moderate with tbe sides parallel, not recurved. Nostrils suboval. 

 placed near tbe culmen. Lamellce elongated. Feet robust, the toes armed witb large claws. 



Anat. Char. Unknown. 



Anas. Linn. Lath. 



Tadorna. Selby. 



Casarka. Bonap. 



Type. Casarka rutila. 



Affinity. This genus may be distinguished from Tadorna, to which it is closely allied, by 

 the straighter and much shorter bill. 



