2(121 
IMMER GOOSE. 
considered as distinct species. So far as I have gone, I am 
disposed to consider the Black4hroated and the Red- 
throated Divers as the same species ; and I have no hesi- 
tation in asserting my belief of the Speckled Diver being the 
young of the latter. I once shot a bird quite corresponding 
with the description of the Colymhus stellatus ; and on ex- 
amining carefully the under part of its neck, I found several 
ferruginous feathers just shooting forth, and the bird, in 
other respects, beginning to assume the plumage of the Red- 
throated Diver. Another Speckled Diver has indeed been 
described, but I do not perceive that it differs in any es- 
sential respect from the C. stellatus. 
If these views, then, be correct, we shall find only two 
distinct species, the Colymhus gla^ialis and the C. septen- 
trionalis, where six separate species have been usually de- 
scribed. 
Edinburgh^ i 
1^^ March 182^. j 
