2280 The Zoologist. — September, 1870. 



Blackthroated Diver. — More rare than the former species, but 

 sometimes seen in Mount's Ba}'. 



Redthroated Diver. — 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," which is supposed to be this bird after the autumnal moult. 



Common Guillemot. — Frequently seen singly, and in small parties, 

 in Mount's Bay, and around our coast. This bird, which is about the 

 size of a bantam fowl, lays its single egg, which is quite as large as 

 that of a turkey, and scarcely two are found alike, — some being green, 

 white, and of the intermediate tints, — some immaculate, and others 

 more or less spotted. 



Ringed Guillemot. — The specific distinction of this bird from the 

 common guillemot is doubted. 



Black Guillemot. — Rare on the western coasts of Cornwall: one 

 example, in intermediate plumage, taken some years since in Mount's 

 Bay. 



Little Auk. — Not unfrequently met with in Mount's Bay in some 

 seasons : other instances of its capture in the county are recorded, 

 although regarded as a rare bird. 



Puffin. — Occasionally observed on the Land's End cliffs, but the 

 precipitous rocks on some of the islands at Scilly appear to be its 

 favourite haunts, where it annually breeds ; egg dirty while. 



Razorbill. — A common species, sometimes appearing in small 

 parties in Mount's Bay, and all round our coast, especially at Scilly. 



Cormorant. — Generally distributed throughout the western coast of 

 Cornwall, sometimes observed inland. Number of tail-feathers, 

 fourteen ; this, together with a while patch over the thigh, and on 

 the throat, distinguishes it in summer from the common shag. 



Shag. — More numerous as a species than the last-named, and more 

 frequently observed in creeks and arms of the sea. Number of tail- 

 feathers, twelve. A reverted occipital crest distinguishes it in summer 

 plumage. 



Ganttet. — Not unfrequently observed, and sometimes in small 

 companies, in Mount's Bay and on the north coast. The young of 

 the year is remarkable for a plumage wholly unlike that of the adult 

 bird, being smoke-gray, studded all over with minute white specks. 

 Not known to breed on the Cornish coast, or at Scilly. 



Edward Hearle Rodd. 

 (To be conlinued.) 



