114 ESMARK : MOLLUSCA OF NORWAY. 



S. pfeifferi var. contortula Baudon. Reno, in the Amt of 



Tromsd. 



Subgenus LUCENA Aken. 

 Succinea oblonga Drap. Malmden, Lindden, and Brand- 



skjser, near Christiania, Krokkleven at Ringerige. 



S. oblonga var. agonostoma Kustr. Sundvolden at Ringe- 

 rige, Malmden. 



S. oblonga var. arenaria Bouch. Langesund. 



II. HYDROPHILA Fer. 



Family AURICULID^E. 



Genus CARYCHIUM Miill. 



Carychium minimum Miill. Common in Christiania and 

 Christiansand Stifts, 



Family LIMN^ID^. 



Subfamily LIMN^INA. 



Genus LIMN^A L. 



Subgenus LYMNUS Mont. 



Limnsea Stagnalis L. Is not very common. It is very 

 , variable, not only from different localities but also from the 

 same lake. The head-type as in Rossmassler's Iconographie, 

 vol. v., pi. 128, fig. 1230, is rare ; much more frequently 

 we meet with slender forms, more or less resembling vulgaris 

 and appressa Say. Lakes by Christiania ; Formo in 

 Gudbransdalen, with the columella bent very much back- 

 wards ; the Pasvikelv in South Varanger ; and Hennaessjden 

 in the Amt of Nordland. The largest specimen belongs to 

 Prof. Sars, it is from CEstensd, near Christiania, alt. 5 5 "5 

 mill., diam. 27 mill., mouth alt. 29 mill, diam. 16 mill. 



L. stagnalis var. vulgaris Leach. Not uncommon; colour 

 brown to greyish-brown, and very variable. Specimens from 

 Padderudvand in Asker were of the following dimensions : — 



alt. 38 mill., diam. i8"5 mill., mouth alt. 20'5 mill., diam. 13 mill. 



5> 3^ " 5) ^5 5J >3 ■'■7 J5 JJ 9 5 '3 



From Ldvtjern at Eker : — 



J C, v., Oct., 1886. 



