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EDWARD W. BERRY 



deposits as far south as New York state in this country, and 

 Switzerland and Galicia in Europe. Three of them occur in 

 Germany. The northern peat bog species Salix repens and S. 

 myrtilloides are both found in England. The sub-arctic species 

 Salix aurita and S. caprea occur respectively in England and 

 Denmark. The osier or basket willow is recorded from France 



Fig. 1. Sketch map of Europe showing the limits of the continental ice sheet, 

 the present distribution and the Pleistocene occurrences of Salix polaris (modi- 

 fied from Nathorst, 1891). 1, vicinity of Edinburgh; 2, localities in Yorkshire; 



8, localities in Norfolk and Suffolk; 4, Devonshire; 5, numerous localities in the 

 Alps; 6, localities in Bavaria; 7, localities in Jutland; 8, localities in Zeeland; 



9, numerous localities in North Germany; 10, localities in Esthonia, Livonia and 

 Vitebsk; 11, numerous localities in Schonen, Gotland and Jemtland; IS, Felek in 

 Hungary. 



and Wtirttemberg, and a very similar form occurs in the Pleisto- 

 cene deposits of North Carohna and Kentucky. The white 



