123 



Helix peregrina. DillwTjn, p. 954. 



Shell an inch long, regularly tapering, with the ulti- 

 mate volution not larger in proportion than the 

 rest : spire composed of seven or eight tumid vo- 

 lutions, on the larger of which are often a few- 

 transverse striae, and all of them obscurely striate 

 longitudinally : aperture narrow oval, not a third 

 part as long as the spire, with the pillar spread 

 and white, but not forming an umbilicus. 



It varies in the convexity of the volutions, and their 

 number, as we have them from different waters 

 with from six to nine. 



In stagnant waters, rather local. 



107. LiMNEUs ^9«/«<6'^m. Shell conic-oval, with six 

 rather tumid volutions, the lower one somewhat 

 angular by raised transverse and longitudinal striae. 



Limneus palustris. Drap. p. 52. t. 2. f. 40 — 42. 



and?. 3./. 1, 2. 

 Lymneus palustris. Brard, p. 136. t. h.f. 6, 7. 

 Lymnaea palustris. Lamarck, vi. ii. p. 160. 

 Stagnicola communis. Leach, Mollusc, p. 142. 

 Helix palustris. Mont. p. 373. t. 16./. 10. 



Shell three quarters of an inch long, brown horn- 



