Land »nd Freshwater Mollusca. 101 



very little calcium. Most of them have the upper whorls 

 more os less gnawed. The colour is light brown. Together 

 with the preceding species. 



L. palustris Müll. 



var. fusca C. Pf. Very common where it occurs in 

 Fjeldfrøskelv. The form is somewhat elongated conic, and 

 resembles Clessins figure in Deut. Exc. Moll. Fauna. The 

 largest has the bight 17 m. m. and br. 8,5 m. m. The up- 

 per whorls are mostly gnawed, the last with sculpture as in 

 L. stagnalis. 



var. turricula Cles. Frequent in the same river as the 

 preceding one. Both varieties are found in „Langkjosen", 

 only on the tufts of carex, just then overflowed with water. 

 Single specimens are found in a closed creek by Fjeldfrøsk 

 bridge, as well as in a creek in Maalselven. In both the 

 last places under similar circumstances as in „Langkjosen" . 



L. peregra Müll. All the shells collected seemed to 

 have been dead, the were thin and brittle, the whorls con- 

 vex; the color greyish yellow. It must be referred to Kobelts 

 figure 1493 Iv 149 in Rossra. Iconog. BV, The largest shell 

 has only the last IV2 whorls left. The hight of the mouth 

 11,5 m. m., which makes it probable that the hight of the 

 shell have been between 16— 17 ra m. All the shells have 

 marks of gnawing, especially the upper whorls with hollows 

 and furrows „Is found in great numbers in „Sten vand", a 

 mountain lake, in a bed of limestone, in Salangen." 



L. truncatula Müll. In a ditch on Sørstranden by 

 Tromsø. In a limestone quarry north of the town. 



var. ventricosa. The shell thin and brittle, the colour 

 yellowish brown, somewhat glossy, the whorls distinctly trun- 

 cated as in typica. Moen in Maalselven. 



var. microstoma (Mai. Bl. 1879, Tr. II, F. 3). The shell 

 firm and solid, dark redish brown, several specimens have 

 on the inner lip a thin redish calcareous layer. The colu^ 



