150 Capt. Blakiston on the Birds of the 



son's Bay, in the 'Fauna Bor.-Ani.;' and both Mr. Murray and 

 myself have received specimens from the west coast of Hudson's 

 Bay. 



SOMATERIA MOLLISSIMA. 



I have received from Hudson's Bay fine specimens of the 

 Common Eider. 



SoMATERIA V-NIGRUM. 



This species of Eider, hitherto found only on the Pacific, is 

 recorded by Mr. Ross as an inhabitant of Great Slave Lake, in 

 latitude 61° N., and longitude 114° W. It is said to be rare 

 in that locality, only two specimens having been obtained. 

 This is another instance of the occurrence of the fauna of the 

 Pacific in this northern and western region, which I have before 

 adverted to. After all, it is nothing more than what we should 

 expect ; for on observing the configuration of the north-western 

 part of the American continent, it is only natural that the birds 

 wintering about Vancouver Island and to the southward should 

 find their way, in summer, across the small portion of continent 

 intervening between them and the Arctic Ocean, in place of 

 making their way as far westward as Behring's Strait. There 

 is another Eider (although it is placed in another genus), 

 belonging to the American continent, Arctonetta fischeri, like- 

 wise described by INIr, George Gray, from specimens from Norton 

 Sound, in Russian America*. 



SoMATERIA SPECTABILIS. 



The King Eider is noticed from the Arctic regions in the 'Fauna 

 Bor.-Am.' ; and I have seen specimens from Hudson's Bay. 



Erismatura rubida. 



A specimen is given in the ' Fauna Bor.-Am.' from the Sas- 

 katchawan ; and I examined one at York Factory, on Hudson's 

 Bay. Mr. Ross records it as an inhabitant of Great Slave Lake. 



114. Mergus americanus. 



I found the American Goosander as far west as the Rocky 

 Mountains (' Ibis,' vol. iv. p. 10), and have seen a specimen 

 from Hudson's Bay. It is given in the ' Fauna Bor.-Am.' as 

 M. merganser. 



* See Proc. Zool. Soc. 185.5, p. 211. 



