419 
LAND AND FRESH WATER MOLLUSCA 
IN NORTH-WEST ICELAND. 
HANS SCHLESCH. 
DuRING July this year, I spent a week in the interior of Isa- 
fjordur, in North West Iceland, examining the hot springs 
there, and investigating the molluscan fauna of the district. 
This portion of Iceland is geologically the oldest part of the 
island, and is divided by many long, narrow and deep fiords, 
separated by steep rocks reaching from 1,000 to 2,000 feet in 
height. In this part travelling is exceedingly difficult, and the 
2s earner” 24 
Map of North-West Iceland. 
paths and roads are so poor that only the Icelandic ponies can 
get a footing. Therefore the district has to be visited by boats, 
and this is rendered unpleasant and often dangerous by the 
sudden storms which arise. Here and there in this district 
are numerous small circular lakes, which have been traced 
back to the glacial period. 
The hot springs, for which the district is famous, occur near 
the beach. One near the farm Kelda by Mjofafjord rises at a 
height of nearly 400 feet. 
On Reykjanes I found living examples of Limnaea getsericola 
in water with a temperature of 45 degrees C. Near the 
Armula farm, in the vicinity of the great Dianga, and in the 
Heidalur valley by Mjofafjord are fairly large bushes of birch, 
and on the ground near these I found Vitrina angelica, Conulus 
fabricii, Vertigo arctica and Succinea groenlandica. 
Mr. Sikes* records Helix arbustorum and Pisidium casertanum 
* Non-Marine Mollusca of Iceland. Journ. of Conch., April, 1913. 
1913 Dec. 1. 
(G* 
