258 The Icelandic Forms of Limncsa. 



and Mr. John W. Taylor, M.Sc, very kindly identified the 

 specimens. During a visit to the Natural History Museum 

 at Reykjavik, I had the opportunity of looking over the collec- 

 tions of shells there. All my own finds were made in the North- 

 West, 1913-14.* 



Mr. F. H. Sikes, of Sevenoaks (Kent), published a list of 

 his collections made in 1912, in the Journal of Conchology, 1913, 

 pp. 54-56, and in the Proceedings of the Malacological Society 

 of London, 1914, pp. 11-12, Mr. Preston has described a new 

 variety, sikesi. I have also referred to the localities of finds 

 made by the late Professor Steenstrup, in Morch's ' Faunula 

 Molluscorum Islandice,' 1867, and Dr. A. C. Johansen's ' Om 

 den fossile Kvartcere Molluskfauna i Danmark,' etc. Probably 

 Eggert Olafsonf meant Limncea peregra in his ' another kind, 

 white Turbo globoso-acutus, spiris tribus, testa crassiore, alba, 

 lives by a brooklet in Saudlauksdalur, and is to be found both 

 in the water and on dry land, X and Turbo globoso subacutus 

 fuscus is that species discovered in 1752 among the washed- 

 up water-plants on the shores of the Myvatn, it follows then, 

 that this species lives in this lake.' My own specimen and 

 some of Mr. Saemundsson may be seen in the Hull Museum. 



I. Subgenus Radix Montfort. 



1. — Limncec peregra [Miiller]. 

 W. Bessastadir near Reykjavik (J.St.), Raudavatn near 



Revkjavik, 1912 ! (F.H.S.). 

 N. Svartadalsvatn, 1876 ! (T.Th. in R.M.). 

 S. Sidan, near Skapta ! (J.St.). Laugarvatn in a tempera- 

 ■ tureof 4 3°C.! (J.St.). 



(i.) var. geisericola [Beck]. 

 (Syn. var. minor M6rch = var. conglobata Taylor.) 



W. Laugarnar by Reykjavik! (J.St, and F.H.S.). 



Reykjavalla— laug, 11/7/1896 ! (B.S. in R.H.). Botn 

 in Sugandafjordur, 1913 ! (H.S.), Raudamyri! Kelda ! 

 Reykjanes in 45°C. ! Laugaland and Laugabol! all in the 

 Isafjardardjup 1913 ! (H.S.), Hjardarholt in Dalasyssel, 

 Aug., 1887! (R.M.) 



S. Near Hekla in 40°C, Geysir in 34°C, (A.C.J.). 



N. Botnvatn, S. Thingeyarsyssel 1/8/1913 ! (B.S.). 



(ii.) forma albina. 

 W. An albino specimen of var. geisericola was found in the 

 hot spring near Laugabol, in the interior of Isafjordur, 

 4th June, 1914! (H.S.). Specimen in the Hull Museum. 



* The Naturalist, 1913, pp. 119-120. 

 •f Rejse gennem Island, Soro, 1772. 



\ It is characteristic of L. peregra that it often lives in mud, in ditches 

 without water. 



Naturalist, 



