BIRDS OF THE CAMBRIDGE REGION. 89 



are the only ones known to me of the occurrence of the species in Fresh Pond 

 during the last twenty years.' 



Loons occasionally visit the Mystic Ponds, and Mr. W. A. Jeffries tells me 

 that he has seen them, on one or two occasions, flying over the Back Bay Basin ; 

 he does not think, however, that they ever alight there. 



5. Gavia lumme (Gunn.). 

 Red-throated Loon. 



Very rare transient visitor in autumn. 



I am indebted to my friend Mr. Ruthven Deane for the skin of a young 

 male Red-throated Loon which he shot in Fresh Pond on October 21, 1871. 

 This is the only record that my notes supply for the Cambridge Region, 

 although the species occurs commonly enough at its seasons of migration, and 

 not uncommonly in winter, along the neighboring seacoast. 



6. Uria lomvia (Linn.). 

 Brunnich's Murre. 



Rare visitor in late autumn and winter. 



On December 11, 1 901, a Brunnich's Murre was seen in the Back Bay 

 Basin very close to Harvard Bridge by Mr. Harold Bowditch and Mr. John T. 

 Nichols. At one time it was nearly beneath them, and as they had a good glass 

 they feel confident that no mistake was made concerning its identity. I am 

 equally sure of that of a young Murre which I found in Fresh Pond on the morn- 

 ing of November 30, 1902. It was swimming in deep water about two hundred 

 yards from the end of Hemlock Point and not far from an immense flock of 

 Herring Gulls. During the twenty minutes or more that I spent watching it, it 

 remained in nearly the same spot, busily employed in preening its feathers. 



'Just as this paper is going to press I learn that a Loon, apparently in immature plumage, was 

 seen in Fresh Pond on April 26, 1905, by Mr. Harold Bowditch and Mr. Richard S. Eustis. 



