OP CONCHOLOGY. 41 



ON THE LAND AND FRESH-WATER MOLLUSCA OP 



ICELAND. 



BY OTTO A. L. MORCH. 



Olafsen and Povelsen are the first who have mentioned land 

 and fresh-water mollusca in Iceland, in their work " Reise igjen- 

 vem Island, 1772." Mohr, in his "Forsog til en Islandsk Natur- 

 historie," 1786, mentions also some; but the collections are all 

 lost. 



In 1841 Prof. Steenstrup and Hr. Hallgrimson made con- 

 siderable collections in various parts of Iceland. The collections 

 are preserved in the University Museum of Copenhagen. A list 

 is published by Prof. Steenstrup in the " 24ter Versamlung 

 Deutscher Naturforscher und Aertzte in Kiel," 1846, p. 221. 

 In my Synopsis Molluscorum terrestrium et fluviatilium Danise, 

 1864, are the species of Iceland mentioned, ch. v, Marten's 

 Malacozoologische Blatter, xii. Litteratur, p. 28. 



1. LlMAX MARGINATUS, Mull. 



Several bleached specimens, about 24 mm. long. Some smaller 

 specimens, about 10 mm. long, have still intense black bands on 

 the mantle, although collected in 1841. 



2. Arion ater, L. 



Limax ater, Svartesnigill, Olafs. i, p. 612. 

 " " Brekkusnigel, Mohr, p. 115. 



Nupshlid and other places in Linghills (Olafs.) Not rare on 

 the west side (Olafs.) Not rare on the east side (Mohr). 



3. Arion fuscus, Miill. 



Some specimens, two of which are of the var. A. hortensis, 

 Fer. 



