Migrations of North American Birds. 337 
the slide are reversed. It is best to thoroughly explore the slide 
before picking up the objects, and to register those desired to be 
Arr. XLI—The Distribution and Migrations of North American 
Birds ; by Spencer F. Barrp, Asst. Sec. Smithsonian Institu- 
tion. (Abstract of a memoir presented to the National Acad- 
emy of Sciences, Jan., 1865.) 
[Concluded from p, 192.] 
A CoMPARISON of the carefully prepared lists of Greenland 
birds by Reinhardt in the Ibis for 1861, and of Iceland birds 
by Newton, published in “Iceland, its Scenes and Sagas,” b 
Sabine Baring-Gould, in 1863, will show that all the Jand birds 
Mentioned as abundant in Iceland are, with few exceptions, 
More or less common in Greenland; and it is therefore very 
probable that the additions to the lists of European birds found 
in Greenland are to be looked for among the remainder of the 
Ieelandic species. The following list, compiled from the above 
Sources, of all land birds of Iceland and of the European spe- 
Cles occurring in Greenland, will illustrate the relationship in 
this respect. 
Am. Jour. Sct.—Szconp SzRigs, VoL. XLI, No. 123.—Mary, 1866. 
43 
