THE ICELANDIC PISIDIUM-FAUNA. 
HANS SCHLESCH, 
Hellerup, Denmark. 
‘Tuis list includes the collections formed by F. H. Sikes (London) 
Bjarni Semundsson (Reykjadik) and myself, together with 
the finds made by the late Prof. Steenstrup during his visit in 
1839-40. Prof. Steenstrup cites the locality ‘ Arnardrangur,’ 
but I am unable to identify the situation of this. Probably 
it is a small place in West Iceland. JI am much indebted 
to Mr. Semundsson for generously handing over his collections 
to me, and to Mr. John W. Taylor for kindly assisting me in 
the determination of species. Mr. Semundsson’s specimens 
and my own finds are included in the collection in the Municipal 
Museum, Hull. 
1. Subgenus Fluminina Clessin. 
1.—Pisidium amnicum Miller. 
Habit: Botnvatn, Sudur Thingeyarsyssel. N.Iceland, 
Aug. Ist, 1913, (Semundsson). This species is probably 
identical with the concha bwalvis, testa ovata oblonga. 
planiuscula of Eggert Olafsson and Tellina lacustris of 
Mohr. 
2. Subgenus Fossarina Clessin. 
2.—Pisidium pulchellum Jenyns. 
Habit: Arnardrangur (Steenstrup). Engidal near Isaf- 
jOrdur, 1914, (Schlesch). N.W. Iceland. 
3.—Pisidium mtidum Jenyns. 
Habit: Arnadrangur (Steenstrup). Engidal near Isaf- 
jOrdur, 1914, (Schlesch). N.W. Iceland. 
var. feddersent Westerlund. 
Habit : Islandia (Feddersen) in Westerlund: Fauna in der 
palearct. Reg. leb. Binnenconchylien, 1890, VII., p. 24. 
4.—Pisidium subtruncatum Malm. 
Habit: Botnvatn, Sudur Thingeyarsyssel, N. Iceland, 
Aug. Ist, 1913, (Semundsson). 
5.—Pisidium lilljeborgi Clessin. 
Habit: Thingvellir and Raudavatn, S.W. Iceland, I912, 
(F. H. Sikes); Bolungarvik, N. W. Iceland, 1913, 
(Schlesch). 
6.—Pisidium scholtzi Clessin. 
Habit : Hnifsdal, Isafjérdur, N.W. Iceland, 1913 (Schlesch). 
7.—Pisidium pusillum (Gmelin). 
Habit: near Arnardrangur (Steenstrup), Laugaland, 
Drangajokul, 1913, (Schlesch). N.W. Iceland. 
1916 Sep: 
