of Colymbus adamsi in Nurwaij. 



273 



Only one specimen before me exhibits this plumage during 

 its assumption. This, which belongs to the Trondhjem Mu- 

 seum^ and \yas shot in the Trondhjem fjord at the beginning 



Fiff. a. 



Fio-. b. 



Feathers fioni the hack of C. admii.'^i :—((. From a hinl in fir.-t winter- 

 phiniage : h. From a hird in .second ov third wintcr-|ihimage. 



