ON THE FAUNA OF IRELAND. : 379 
The three species of Fuligula noticed as Irish, and Clang. 
vulgaris, are regular winter visitants: Oid. nigra and Har. 
glacialis would likewise seem to be so, but in very small num- 
bers; for four winters successively I have obtained a single 
specimen of the last in Belfast Bay. Oid. fusca, Som. mollis- 
sima, and SS. spectabilis, can only be noticed as very rare 
visitants ; once only has the last been obtained *. 
Ful. rufina has in a very few instances occurred in England. 
F, Nyroca is but a rare and occasional visitant; and F. dispar 
has once been procured. Clang. histrionica is likewise very 
rare. 
Fam. Anatide. 
Sub-Fam. Merganine. 
Ireland, Great Britain. 
Mergus Merganser, L. + 
»  Serrator, Z. + 
0 Mergus cucullatus, Z. 
»  albellus, Z. + 
M. Serrator is indigenous, nestling on islets both of marine 
and fresh-water loughs. M. Merganser is a regular, and M. 
albellus an occasional winter visitant. 
M. cucullatus has a place in the British catalogue from the 
occurrence of a single specimen. 
Fam. Colymbide. 
Ireland. Great Britain. 
Podiceps cristatus, Lath. 
»  Trubricollis, Lath. 
»,  cornutus, Lath. 
»  auritus, Lath. 
» minor, Lath. 
Colymbus glacialis, Z. 
»  arcticus, Z. 
»  Septentrionalis, Z. 
++++4++++4 
Pod. minor is common and resident; P. cristatus is more 
rare, but resident on the larger lakes; P. rubricollis is known 
only as a rare visitant; P. cornutus is not of uncommon occur- 
rence in winter, at which season P. auritus more rarely occurs. 
These two last species are most probably indigenous, as in 
England, but they have not come under my cognizance in 
summer. Col. glacialis and C. septentrionalis are regular 
winter visitants; C. arcticus is much more rare, but occasion- 
ally met with at the same season. 
* The specimen is in the collection of Mr. R. Ball. 
