163 



July; large flocks continually passed Cape Boheman, coming f]-onl 

 their breeding colony in Dickson Land (Mt. Congress), whicii I visited 

 with the Oxford Expedition on July 13. Here they breed in great 

 numbers together with Kittiwakes. At that time they had young. 



About the middle of August their number strongly decreased in 

 Icefjord and in the end of August they had all disappeared, a fact 

 also stated by Cocks (1883, p. 487, cited after le Eoi). On our 

 Icefjord-trip in the end of August I saw only two specimens in the 

 mouth of Klaas Billen Bay! They had totally disappeared from 

 their colony at Dickson Land, which we passed on Aug. 27. So all' 

 Brünnich's Guillemots leave with their young for the open sea in 

 the latter half of August. 



This bird is very agile in the water. Once on the wing it flies 

 very quickly and then it is very difficult to shoot. It is said to 

 winter partly in open water near the West-coast of Spitsbergen. 



Uria grylle Mandti (Licht.), Mandt's Guillemot. 



Uria mcmdtii Licht., Trevor Battye (1897), p. 598. 

 Uria grylle var. mandtii Licht., Kolthoff (1903), p. 83. 

 CeppJms mandtii (Licht.), Schalow (1904), p. 124. 

 Cepplms grylle Mandti (Licht.), le Roi (1911), p. 253. 

 Cepphus grylle mandtii Licht., Zedlitz (1911), p. 304. 



cf, Icefjord near Cape Boheman, July 31, 1921. 

 cf, Icefjord near Cape Boheman, Aug. 9, 1921. 

 9 juv., Icefjord near Cape Boheman, Aug. 11, 1921. 



This fine species breeds plentifully in Spitsbergen, but never 

 occurs in large quantities. On June 22 they were numerous off" 

 Bearisle, where they also breed, but they were much more abundant 

 in Icefjord. Here they breed in many localities, as we (O.E.) could 

 state e. g. on July 13 at Mt. Congress, where a few were seen 

 high up in the mountain, above the loomery, and on July 17 on 

 the Anser Isles, where they bred in small numbers in crevices of 

 the diabase-rocks. The clutches consisted of two beautifully spotted 

 eggs, which were highly incubated then, whilst a few newly- 

 hatched young were also found. The birds did not sit very closely 

 on their eggs, but soon left them on our approaching. 



On July 21 I found a small colony of Mandt's Guillemots — con- 

 sisting only out of four pairs — at a precipitous part of the eastern 

 side of Tundra Boheman. Here they bred in the crevices of the 



