I20 ESMARK : MOLLUSCA OF NORWAY. 



P. borealis var. angigyrus West. Tonset, Kvikne, and 



Ringer ige. 

 P. borealis var. flexus West. Christiania. 

 P. borealis var. gredleri Cles. Christiania, Siljordvand in 



Telemarken, Drammen, Gudbrandsdalen. 

 P. borealis var, arcticus Beck. Finmarken. 

 P. polaris B. Esm. and Hoyer. Maalselven, in the Amt of 



Tromso. 

 P. limophilus West. Rare. Jsedderen and Valders. 

 P. concinnus West. Rare. CEier in Gudbransdalen. 

 P. glaber Jefif. Not common. Jaedderen, Valders, Christiania, 



Bergen, Gaaso in Nordland. 

 P. Stromi West. Rare. -Christiania and Eker. 

 P. albus Miill. Common in Christiania, and Christiansand 



Stifts, Bergen, and Qisterdalen in Hamar Stift. 

 P. albus var. hispid us Drap. Drdbak, Sandvigen in Asker ; 



Bergen. 

 P. albus var. cinctutus West. Very common. Christiania, 



Christiansand, and Hamar Stifts, Nordland and Finmarken. 

 P. albus var. depress us West. Ringebu in Gudbransdalen. 

 P. albus var. I em ni scat us Hartm. Gausdal and Ringebu 



in Gudbransdalen, Christiania, Arendal, Jaedderen, and 



Bergen. 

 P. albus var. draparnaldi Jeff. Jaedderen, Stavanger, and 



Fredriksstad. 



Subgenus ARMIGER Hartm. 



P. crista I>. 



P. crista var. nautileus L. Helgo in Mjdsen, and Snaroen 



near Christiania. 

 P. crista var. cristatus Drap. Christiania, Fredriksstad, 



and Stavanger. 

 P. crista var. spinulosus Cles. Fredriksstad. 



Subgenus HIPPEUTIS Ag. 

 P. complanatus L. Rare. Moss, Akersvand in Jarlsberg, 



Skien, and Arendal. 



J.C, v., Oct., 1886. 



