532 THE BIRDS OF HELIGOLAND 



distinction noticeable in North American birds is a somewhat 

 diiferent coloration of the tubercle on the beak. 



331. — Velvet Scoter [Sammtente]. 



ANAS FUSCA, Linn.i 



Heligolandish : Groot Swart Dukker = G?-(;a( Black Diver. 



Anas fusca. Naumann, xii. 123. 



Velvet Scoter. Dresser, vi. 657. 



Canard doxMe tnacreuse. Temminok, Manuel, ii. 854, iv. 543. 



This beautiful large Duck occurs here vmder the same conditions 

 as the preceding species, and in equally enormous, and quite in- 

 calculable quantities. Its breeding range extends likewise through 

 northern Europe and Asia ; and it is also represented in America by 

 a related but scarcely distinguishable form. 



332. — Surf Scoter [Brillenente]. 



ANAS PERSPICILLATA, Linn.'^ 

 Anas perspicillata. Naumann, xii. 140. 



Surf Scoter. Dresser, vi. 669. 



Canard marchand. Temminck, Manuel, ii. 853, iv. 542. 



This beautiful black Amei'ican Duck, an occurrence of which is 

 of the utmost rarity in Europe, has once visited Heligoland, a tine 

 old male having been shot on the 9th of October 1851, near the 

 dune; this example is preserved in my collection. The species 

 has been repeatedly met with and shot on the coast of Great 

 Britain, and several times on the coast of Norway. An example is 

 actually recorded from Finland. The example from Heligoland is, 

 however, probably the only instance of the occurrence of this species 

 in Germany. 



It breeds throughout the whole of the far north of America. 



333. — Scaup [Hergente]. 



ANAS MARILA, Linn.=' 

 Heligolandish : Slabb-Enn. Name without signification. 

 Anas niarila. Naumann, xii. 88. 



Scaup. Dresser, vi. 565. 



Canard milouinan. Temminck, Manuel, ii. 865, iv. 545. 



As already stated when discussing the Common Scoter, this 

 species occurs here in very large numbers during severe winters, 



' (Edemia fusca (lAnn.). - (Edemia perspicillata (Linn.). 



'■' Ftdiguta marila (Linn.). 



