116 LIMN^IDyE. 



which is a distinct umbilical chink : fold rather slight but 

 thick. L. 0-4. B. 0-2. 



Var. 1. major. Shell larger : whorls more swollen and the 

 last considerably exceeding the usual proportion of size. 



Yar. 2. elegans. Shell much larger, more solid and slender, 

 greyish-white, marked with coarse spiral ridges : S2)lre much 

 produced : suture oblique : outer lip thickened. L. 0-6. B. 

 0-225. 



Var. 3. minor. Shell much smaller, thinner and semi- 

 transparent, dark horncolour, marked with stronger and closer 

 longitudinal striae. L. 0-285. B. 0-165. 



Var. 4. alhida. Shell smaller, milk-white. 



Var. 5. scalariformis. Shell smaller : whorls nearly dis- 

 united. 



Var. 6. microstoma^ Shell smaller and narrower : ivhork 

 more swollen : mouth contracted. 



Habitat : Banks of slow and muddy rivers and 

 streams, marshes, ditches, grassy pools, waterfalls, and 

 moist places everywhere from the northernmost point of 

 Zetland to Jersey. Var. 1 . Penzance (Millet and Barlee) ; 

 Newton Nottage, Glamorganshire (J. G. J.). Var. 2. 

 Hants (Mus. Loscombe). Var. 3. Momitainous tracts 

 and sea-side marshes. Var. 4. Battersea (J. G. J.) : 

 Crymlin Burrows, Swansea, (Moggridge). Var. 5. War- 

 minster (J. G. J.). Var. 6. Southampton (J. G. J.. 

 Besides these varieties, my cabinet contains specimens 

 in which the spire is more produced, or shorter with 

 the whorls partly intorted, and some have interrupted 

 spiral bands of white lines. This species occurs in our 

 upper tertiary beds. Its foreign distribution extends 

 from Siberia to Algeria and Sicily; and, according to 

 Captain Hutton, it is a native of Afghanistan. 



This abundant but pretty little mollusk is nearly 

 amphibious, being more frequently met with out of the 

 water than in it. It is also found in very elevated spots. 



