Bibliography 319 



PouLSEN, E. M., 1939. Freshwater Crustacea. — Zool. of Icel. 111:35. Copenhagen, 



p. 1-50. 

 Praeger, R. L., 1932. Recent views bearing on the problem of the Irish flora and 



fauna. — Proc. R. Irish Ac. B. 41. Dubhn, p. 125-145. 



— 1934- The botanist in Ireland. — Dublin. 



Reinig, W. F., 1937. Die Holarktis. Ein Beitrag zur diluvialen und alluvialen Ge- 

 schichte der zirkumpolaren Faunen- und Florengebiete. — Jena, pp. l-vil, 

 1-124. 



— 1938. Elimination und Selektion. — Jena, pp. l-viii, 1-146. 



Reitter, E., 1875. Beitrag zur Kenntniss der aussereuropaischen Crytophagidae. — 

 Coleopt. Hefte (E. v. Harold). 13. Miinchen, p. 73-87. 



— 191 1. Fauna Germanica. III. — Stuttgart, p. 1-436. 



Rensch, B., 1950. Die Verteilung der Tierwelt im Raum. — Handb. d. Biol. V: i. 



Potsdam, p. 125-172. 

 SiEMUNDSSON, B., 1939. Mammalia. — Zool. of Icel. IV: 76. Copenhagen, p. 1-38. 

 Sahlberg, J., 1880. Bidrag till Nordvestra Sibiriens insektfauna. Coleoptera, &c. — 



K. Svensk. Vet. Ak. Handl. 17. Stockholm, p. 1-115. 

 Salomonsen, F., 1 95 1. The immigration and breeding of the fieldfare (Turdus 



pilaris L.) in Greenland. — Proc. X. Intern. Ornith. Congr. (1950). Uppsala, p. 



515-526. 

 Salomonsen, F. & Gitz-Johansen, 1950. Gronlands Fugle. The Birds of Green- 

 land. — Copenhagen, p. 1-608. 

 Sann, J., 1952. (On Penguinus [Alca] impennis.) — Fauna. 5. (Norsk Zool. Foren.) 



Drammen, p. 74-75. 

 ScHARFF, R. F., 1907. European animals: their geological history and geographical 



distribution. — London, pp. l-xiv, 1-258. 



— 1909. On the evidence of a former land-bridge between Northern Europe and 

 North America. — Proc. R. Irish Ac. 28 B. Dublin, p. 1-28. 



— 191 1. Distribution and origin of life in America. — London, pp. i-xvi, 1-497- 

 ScHERHAG, R., 1948. Neue Methoden der Wetteranalyse und Wetterprognose. — 



Berlin, pp. i-xii, 1-424. 

 Schmidt, K. P., 1946. On the zoogeography of the Holarctic region. — Copeia. Ann 



Arbor, Mich., p. 144-152. 

 Segerstrale, S. G., 1954. The freshwater Amphipods, Gammarus pulex (L.) and 



Gammarus lacustris G. O. Sars, in Denmark and Fennoscandia, &c. — Comment. 



Biol., Soc. Sci. Fenn. XV: i. Helsingfors, p. 1-91. 

 Semenov, a., 1935. Analecta coleopterologica. XXI. — Rev. Russ. d'Ent. 25. 



Moscow, p. 275. 

 Simpson, G. G., 1940. Mammals and land bridges. — Journ. Wash. Ac. Sci. 30. 



Washington, D.C., p. 137-163. 



— 1947. Holarctic Mammalian faunas and continental relationships during the 

 Cenozoic. — Bull. Geol. Soc. Amer. 58. New York, p. 613-687. 



Smith, M. R., 1951. Formicidae. — In: Muesebeck, Krombein, Townes, Hymeno- 

 ptera of America, &c. — U. S. Dept. Agric, Agric. Monogr. 2. Washington, D. C, 



p. 778-875. 

 SpArck, R., 1934. Freshwater Sponges. — Zool. of the Faroes. I:i, 4. Copenhagen, 



P- 1-3- 



