THE MICROPALÆONTOLOGY OF POSTGLACIAL DEPOSITS. 449 
Studies in the Micropalæontology of Postglacial Deposits in Northern 
Scotland and the Scotch Isles, with especial reference to the history 
of the woodlands. By G. Erprmax. (Communicated by Dr. E. J. 
NALISBURY, F.L.S.) 
(With 20 Figures in the text, and Map—PLaTE 41.) 
INTRODUCTION. 
Tus paper is based upon material collected during a journey in Scotland 
and the Scottish Isles in July 1922. The object of this journey was to 
obtain evidence as to the development of postglacial woodlands from the 
peat mosses of Scotland, and compare it with the evidence from the peat 
mosses of the south-west of Sweden, previously obtained and published by 
the author in 1920 and 1921. Further, by the investigation of an isolated 
group of islands (e. g. the Shetlands or the Faroes *), it might be possible to 
determine to what extent pollen carried long distances by the wind (150- 
200 km.) would influence a fossil pollen-flora. 
My route was as follows (map, Pl. 41) :— 
July 3rd-8th.— Achnasheen, Ross-shire, situated near the watershed between 
the Moray Firth and the Minch. 
6th.—Strathcarron, Ross-shire (on the west coast). 
9th-10th.—/sle of Skye. 
11th-18th.—/sle of Lewis. 
19th-20th.— Helmsdale, Sutherlandshire. 
21st-29th.— The Orkneys, mainland ; 28th, Westray. 
30th-Aug. 1st.— The Shetlands, mainland. 
LE 
The method employed in my investigations was that worked out by 
Lennart von Post, State Geologist of the Geological Survey of Sweden. The 
first account of this method was given in a paper by von Post, which was read 
at the meeting of Scandinavian naturalists at Christiania in 1916 [** Skog- 
striidspollen i sydsvenska torfmosselagerföljder ” (The pollen of forest trees 
in the mosses of South Sweden), Forh. ved 16. Skand. naturforskeimöte 
1916]. Later, Dr. von Post published a series of papers dealing with the 
method and showing how it could be applied in many ways: e.g., “ Post- 
arktiska klimattyper i södra Sverige?” (Postarctie types of climate in Southern 
Sweden), Geol. Foren. Förhandl. Bd. 42, 1920, and * Ur de sydsveuska 
skogarnas historia under postarktisk tid ” (summary : Some features of the 
* Unfortunately I was unable to visit the Faroe Islands, 
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