NATURAL HISTORY SOCIETY OF GLASGOW. 



319 



to be. The former I compared with your bird'- 1 when it was here, 

 and the two seemed to agree perfectly. The latter, you see, differs 

 a good deal in the form of the base of the bill, and most markedly 



in the outline of the bare space It is unfortunate 



that we have not a young C. bewicki. nor an old C. americanus ; 

 but I can hardly think that the differences shown in the sketches 

 depend entirely on age. The upshot is that I am inclined to 

 consider C. americanus as a distinct species, but that your bird is 

 not an example of it, nor can I see any difference whatever between 

 your bird and C. bewicki." 



The following are rough copies taken from Prof. Newton's 

 sketches above referred to : — 



G. beivkki, ad. 

 Goodacre. 



C. americanus, juv. 

 Hepburn. 

 Copied from Sketch by A. N. — 8, ii. , 80. 



* One shot in Ardnamurchan. 



