BRITISH SPECIES UNKNOWN AS IRISH. 
427 
In the order Natatores, the following birds are enumerated at 
the present time in the British, and not in the Irish, catalogue. 
A few of the leading points respecting them have been already 
given in connexion with the species to which they are most nearly 
allied, so that little more is now to be done than to bring them 
together here. 
BRITISH AND NON-IRISH SPECIES. 
Cygnus immutabilis, Yarr. 
Anser brachyrhyncus , Baill. 
,, gambensis, Linn, (sp.) 
Anas bimaculata , Penn. 
Polysticla* Stelleri , Pall, (sp.) 
Fuligula rufina , Pall, (sp.) 
Pul. leucoplitlialmos, Bechst. (sp.) 
Pul. mariloides , Vigors. 
Clangula histrionica , Linn, (sp.) 
„ albeola , Porst. (sp.) 
Sterna casjoia , Pall. 
,, anglica , Mont. 
Larus Rossii , Rich. 
„ atricilla, Linn. 
Thalassidroma Bulweri , Jard. and 
Selby (sp.). 
Thalassidroma Wilsoni, Bonap. 
Of these sixteen species, three have been but once obtained in 
Great Britain ; viz., — spur- winged goose, a bird of northern and 
western Africa ; — North American scaup, whose name marks its 
country (it is not known where the individual included in 
the British list was killed ; being purchased fresh in London 
market affords no evidence of its having been procured in the 
British seas or inland waters) Ross's gull, a species of Arctic 
America. % 
Polish Swan .... 
Pink-footed Goose . , 
Spur-winged Goose . 
Bimaculated Duck . , 
Steller's Western Duck 
Red-crested Whistling Duck . 
Perruginous or Nyroca Duck . 
American Scaup Duck 
Harlequin Duck . 
Buffel-headed Duck 
Caspian Tern 
Gull-billed Tern 
Ross's Gull . . 
Laughing Gull . 
Bulwer's Petrel . 
Wilson's Petrel . 
* Eyton. 
f If the Fuligula ferinoides , Bartl, since obtained, be considered the same, we 
have positive evidence of its being killed in England. 
\ Noticed at p. 314. 
