ANSERIN .!•'..] 



14 



GENUS III. BERNICLA. 



Ext. Char. Pedes parvi, digitis posterioribus non lobatis, unguibus magnis instniclis. 

 Tarsi elongati. Rostrum parvum, capite brevius. Nares lincares, in medio rostri positne. 



Anat. Char. Trachea tubula ecpiali. Larynx inferior ossea aliquando bulbosa. 



Ext. Char. Feet small, with the posterior toes not lobaled; the nails large. 7am 

 elongate. Bill small, shorter than the head. Nostrils linear, placed in the middle of the bill. 



Anat. Char. Trachea with the tube of equal size. The inferior Larynx osseous but 

 not bulbous. 



Bernicla. Steph. 



Anas. Linn. 



Type. Bernicla jubata. 



The proportions of the skeleton are as follows : — Depth of the keel to the length of the 

 sternum, as 1 to 3|. Breadth of the pelvis to its length, as 1 to 2. Length of sternum to that 

 of tibia, as 1 to If. Height of cranium to its length, as 1 to 2\. The keel is not continued to 

 the posterior extremity of the sternum. 



Affinity. Nearly allied, both in anatomy and habit, to the preceding and following. 



