Greater Snow-Goose 19 



standing between C. hyperboreus and C. nivalis. Unfortunately this author does not give 

 more detailed data or measurements of such intermediate individuals. 



Geographical Distribution 



Approximately the whole of Northern Arctic America to the east of the Mackenzie 

 River is the breeding-ground of this form, which in winter and during migration occurs 

 in the United States from the east of the Mississippi to the Atlantic Ocean. There is, how- 

 ever, no occasion in this work to enter into greater detail concerning its distribution. 



