224 



NOTES ON THE LAND AND FRESHWATER MOLLUSCA 

 OF EAST ICELAND. 



By HANS SCIILESCH. 



(Read before the Society, April 6tli, 1921). 



During tlie summer 19 19 and 1920 I have had the opportunity to 

 examine the land and fresliwater mollusca at several places in the 

 neighbourhood of Leydisfjord, and in August, last summer, I took 

 two trips over the 3,000 feet high pass Fjardarheidi, to the long 

 and narrow valley, Fljdtsdalr. As my records, and the few from 

 other collectors, show, the fauna of East Iceland bears relations to 

 Scandinavia more than the other parts of Iceland. Also the species 

 occur in greater numbers, probably East Iceland here and there 

 have more lime in the rocks, while most of Iceland is poor in lime ; 

 moreover, the climate during the summer is rather hot, about 2o°C., 

 and steamy. The flora has close relations to that of the Faroes. 

 The mountains are tolerably high and precipitous, about 3,000 feet, 

 and consist mostly of tertiary Basalt and Liparite. Minerals occur 

 everywhere, especially calcareous spar, and in single places marble. 

 For Zeolites the east coast is well known. Most of my specimens I 

 have put tip in the Hull Museum and Reykjavik Museum. Remark- 

 able is the absence of Limiicea geisericola, a form of Z. pereger, 

 characteristic of the numerous hot springs in Iceland, but in Iceland 

 there are only a few of such, far from inliabited places. 



My best thanks are due to Messrs. Chas. Oldham, R. A. Phillips, 

 A. W. Stelfox, and John W. Taylor for assisting me in examining my 

 specimens. 



Abbreviations : — A.C.J., A. C. Johansen; B.S., Bjarui Soemundsson; 

 H.A.S., Hans Schlesch ; F.H.S., F. H. Sikes. 



Limax arborum Bouchard-Chaniereaux. — Seydisfjord (H.A.S.). 

 Certainly common all over. 



Var. alpestris Lessona and PollonerEi ( = var. rupicola Lessona 

 and Pollonera). — Seydisfjord (H.A.S.). 



Var. nigra Scharff. — Seydisfjord, one specimen (H.A.S). 



Agriolimax agrestis (Linne). — Seydisijord (H.A.S.). Very 

 common over Iceland, together with the var. reticulata (Miiller). 



Vitrina pellucida INIiiller var. angelica Beck. — Nordfjord, 1912 

 (F.H.S.). Seydisfjord (H.A.S.). Very commonly distributed. The 

 specimens from Seydisfjord very big. 



Euconulus fulvus (Miiller) { = E. fabricii Btck). — Seydisfjord 

 (F.H.S. and H.A.S.). Common. 



Hyalinia alliaria (Miller).— Seydisfjord (H.A.S.). Rare. 



