418 A COBNISH FAUNA. 



Smew, Mergus alhellus ; rare : a few instances of its occurrence 



on record. 

 Eed-breasted Merganser, M. serrator ; generally a winter visitor. 

 Groosander, M. merganser ; sometimes observed in Mount' s-bay, 



but only in winter plumage : the adult male lias the breast 



of a beautiful glowing maroon buii colour. 

 Great Crested Grebe, Podieeps cristatus ; not uncommon in winter 



on marshes. 

 Red-necked Grebe, P. rubricolUs ; quite as often occurring as the 



last-named species, — frequenting the same localities. 

 Horned Grebe, P. cornutus ; specimens not in adult pluma 



occasionally obtained from the Land's-end district. 

 Eared Grebe, P. auritus ; specimens not unfrequently obtained, 



but generally in immature plumage : a specimen in adult 



summer plumage obtained some years since from St. Just 



pool, Falmouth harbour, and now in the Truro museum. 

 Little Grebe, P. minor ; the most commonly distributed of all the 



grebes in the Land's-end district. In summer plumage the 



neck is dark-red with the chin black. 

 Great Northern Diver, Colymhus glacialis ; found in more or less 



numbers every year, generally in immature plumage, and in 



the autumnal months ; though of late years some specimens 



in the adult state have been killed. 

 Black-throated Diver, C. arcticus ; more rare than the former 



species, sometimes seen in Mount's-bay. 

 Red-throated Diver, C. septentrionalk ; common in the autumnal 



and winter months in Mount's Bay, and at this season 



invariably found without the red throat, and in the plumage 



represented by Bewick as the ''speckled diver." 

 Common Guillimot, TJria troile ; frequently seen singly, and in 



small parties, in Mount's-bay, and around our coast. 

 Ringed Guillimot, U. lacrymans ; the specific distinction of this 



bird from the common guillimot is doubted. 

 Black Guillimot, U. grylle ; rare on the western coasts of Corn- 

 wall : one example, in intermediate plumage, taken some 



years since in Mount's-bay. 

 Little Auk, Mergulus melanoleticos ; not frequently met with on 



our coasts. 



