74 ANNALS OF SCOTTISH NATURAL HISTORY 



67. LARUS MARINUS, Linn., Great Black-backed Gull. Fairly 



common, but many of the birds observed on the mainland 

 were immature. 



68. RISSA TRIDACTVLA, Kittiwake. Mr. Bonar tells me he observed 



a pair diving in Baden Bay. He saw them repeatedly, and 

 is quite certain of his identification. 



69. ALCA TORDA, Linn., Razorbill. Nests on one at least of the 



Summer Islands. 



70. URIA TROILE, Linn., Common Guillemot. Observed in large 



flocks in Baden Bay. 



71. URIA GRYLLE, Linn., Black Guillemot. Very abundant. Mr. 



Bonar found it nesting in the cliffs near Reiff. The male 

 has a very beautiful crooning note which it utters to its mate 

 while swimming, and which, when heard on a still summer 

 evening, is very pleasing. 



72. FRATERCULA ARCTICA, Linn., Puffin. Fairly common on some 



of the Summer Islands, and nesting on at least two of them. 



73. COLYMBUS ARCTICUS, Linn., Black-throated Diver. Mr. Bonar 



observed one on Loch Bhattachan on two different occa- 

 sions. My inquiries at our ghillies elicited no information 

 which showed that they were at all acquainted with the bird. 



74. PROCELLARIA PELAGICA, Linn., Storm Petrel. We found the 



remains of one of these birds, which had probably been 

 killed by a Peregrine Falcon, on one of the Summer Islands. 

 It is no doubt fairly common, but owing to its nocturnal 

 habits and the ignorance of the natives it has escaped ob- 

 servation. 



Such is the brief account of the birds which we were 

 able to associate with Coigach during our brief sojourn in 

 that remote district. Should subsequent investigation prove 

 it inadequate or defective, it ought to be borne in mind that 

 our stay in the region in question was far too short for our 

 purpose ; and further, that this very circumstance prevented 

 us from even attempting to explore the hills beyond an 

 elevation of about 700 feet above the sea-level. Yet even 

 if we had had the opportunity of doing so, I am very doubt- 

 ful that the results of our research would have repaid. the 

 trouble. 



I have to acknowledge my indebtedness to my friend, 

 the Rev. Mr. Bonar, for a large part of the material contained 

 in rny paper. I was indeed very fortunate in having for my 



