31 [ANATINiE. 



The proportions of the skeleton are: the depth of the keel to the length of the sternum as 1 

 to 4. Breadth of pelvis to its length as 1 to If. Length of sternum to that of the tibia as 1 to 

 1|. Height of cranium to its length as 1 to 3. 



Affinity. The tail in this genus is much elongated, presenting in that particular an affinity 

 to the genus Mareca, -which has it slightly so. 



