ESMARK : MOLLUSCA OF NORWAY. II9 



L. truncatula var. microstoma Drouet. Helgo in Mjosen, 



Ullensaker, Gudbrandsdalen, Gaasd, Tromsd, and South- 



Varanger. 

 L. truncatula var. oblonga Puton. Asker and Bryn, near 



Christiania ; Tromsd. 

 L. truncatula var. maximella. Asker, Justd, near Lillesand. 

 L. truncatula var. compressa B. Esm. Bergen, Statelle, 



Brevik, and Tromsd. 

 L. truncatula var. schneideri B. Esm. In several ponds 



on ' Fldifjeld,' near Tromsden, in the Amt of Finmarken. 

 L. truncatula var. minor. Asker. 



Subfamily PHYSINA. 



Genus PHYSA Drap. 



Subgenus PHYSA Drap. 



Physa fontinaiis L. Rare. Vaale, Ramnses, and Jarlsberg, 



in the county of Jarlsberg. 



Subgenus APLEXA Flem, 

 Aplexa hypnorum L. In the neighbourhood of Christiania ; 

 the Justud, near Lillesand, i4'5 mill. alt. 

 Subfamily PLANORBINA. 

 Genus PLANORBIS Guett, 

 Subgenus TROPODISCUS Stein, 

 Planorbis marginatus Drap. Rare. Bergen, Jsedderen ; 

 many years ago found on Bygdd, near Christiania. 

 Subgenus GYRORBIS Ag. 

 P. vortex L. Very rare. Christiania and Bergen. 

 P. rotundatus Poir. Rare. Several places near Christiania 



and Hvalderne. 

 P. spirorbis L. Rare. Asker, 



Subgenus BATHYOMPHALUS Ag. 

 P. contortus L. Very common in Christiania, Christiansand 

 and Hamar Stifts, Nordland, and Finmarken. 

 Subgenus GYRAULUS Ag. 

 P. boreal is Loven, Very common in Christiania, Christian- 

 sand, and Hamar Stifts, Nordland, and Finmarken. 



