304 



SEA-BIRDS 



VAN IjZENDOORN, A. L.J. (1950). The breeding-birds of the Netherlands. Leiden, 



E. J. Brill. 

 Jackson, F. G. (1899). A thousand days in the Arctic. London and New York, 



Harper Bros., 2 vols. 

 Jespersen, p. (1924). The frequency of birds over the high Atlantic Ocean. Nature, 



114: 281-83. 



(1929). On the frequency of birds over the high Atlantic Ocean. 



Verh. VI. Int. Orn. Kongr. Kobenhavn, igsG: 163-72. 



(1930). Ornithological observations in the North Atlantic Ocean. 



*Dana' Oceanogr. Reps. no. 7; 36 pp. 



— (1933). Observations on the oceanic birds of the Pacific and adjacent 



waters. Vidensk. Medd. Dansk. naturh. Foren. g4: 187-221. 



(1946). The breeding birds of Denmark. Copenhagen, Munksgaard. 



Johnson, R. A. (1940). Present range, migration and abundance of the Atlantic 

 murre in North America. Bird-banding, 11: i-ij. 



(1941). Nesting behavior of the Atlantic murre. Auk, 58: 153-63. 



Jones, J. M. (1859). The naturalist in Bermuda; a sketch of the geology, zoology', 



and botany of that remarkable group of islands; together with meteorological 

 observations. London. 

 Kay, G. T. (1947). The young guillemot's flight to the sea. Brit. Birds, 40: 156-57. 



(1948). The gannet in Shetland in winter. Brit. Birds, 41: 268-70. 



(1949). The young gannet. Brit. Birds, 42: 260-63. 



Keighley, J. and LocKLEY, R. M. (1947). Fledging-periods of the razorbill, guillemot 

 and kittiwake. Brit. Birds, 40: 1 65-7 1 . 



(1948). The incubation and fledging-periods 



of the razorbill. Brit. Birds, 41: 1 13-14. 



KiRKMAN, F. B. (1937). Bird behaviour. A contribution based chiefly on a study 

 of the black-headed gull. London and Edinburgh, Nelson & Jack. 



KoLTHOFF, G. (1901). Till Spetsbergen och nordostra Gronland Ar 1900. Stock- 

 holm. 



Kramer, G. (1952). Experiments on bird orientation. Ibis, g4: 265-85. 



Krasovskii, S. K. (1937). The biological basis for the economic exploitation of 

 bird-cliffs and on the biology of the guillemot {Uria lomvia L.). Trans. Arctic 

 Inst. Leningrad, yy: 33-91. 



Kritzler, H. (1948). Observations on behavior in captive fulmars. Condor, 50: 



5-15- 

 KuMLiEN, L. (1879). Contributions to the natural history of Arctic America. Bull. 



U.S. Nat. Mus. no. 15; Birds, pp. 69-105. 

 Lab AT, J. B. (1722). Nouveau voyage aux isles de I'Amerique contenant I'histoire 



naturelle de ces pays, I'origine, les moeurs, la religion, et le gouvernement des 



habitans anciens et moderns, etc. Paris, vol. 2. 

 Lack, D. (1944). Ecological aspects of species-formation in passerine birds. Ibis, 



86: 260-86. 



(1945). The ecology of closely related species with special reference to 



cormorant {Phalacrocorax carbo) and shag {P. aristotelis) . J. Anim. Ecol. 14: 12-16. 



Landt, J. (1800). Forsog til en Beskrivelse over Faeroerne. Kobenhavn. 



(1810). A description of the Feroe Islands, . . . London, transl. of above. 



Lawrence, G. N. (1878). Catalogue of the birds of Dominica from collections 



