77 



[MERGANlNjB. 



Mr. Stephens, in vol. XII. p. 156, of Shaw's Zoology, divides this genus, separating from it 

 the Smew (Mergus albellusj, and placing the other Mergansers under the genus Merganser, Briss. 

 The depth of the keel to the length of the sternum in this genus is as 1 to 5. Breadth of tin 

 pelvis to its length as 1 to 2L Length of the cranium to its depth as 1 to 3\. Length of the 

 femur to the length of the tibia as 1 to If. 



We have spoken hefore of the affinities of this genus under the head of the sub-family 

 Merginte. 



