178. 
179. 
180. 
181. 
THE MOLLUSCA OF DORSETSHIRE, 47 
BITHINIA, Gray, 1821. 
B. tentaculata (Z.) Helix tentaculata, L. 
Pulteney, p. 56, pl. 21, f. 12. 
Rivers, brooks, ditches. 
Generally distributed. 
Fossil: Quaternary deposit, Chesilton, Prestwich, 
Blashenwell tufaceous deposit, J. C. W.-P. 
Fossil : Mammaliferous Crag. 
B. Leachii (Sheppard). 
Slow rivers, ponds, water-courses ; rare. 
Holwell, H. H. Wood. 
Wareham, river Frome, J. C. M.-P. 
Ulwell and Godlingstone, near Swanage, J. C. M.-P. 
VIVIPARIDA. 
VIVIPARUS, Montfort, 1810. 
[V. contecta, Millet. Paludina Listeri, Yorves and 
Hanley. Helix vivipara, Da Costa. 
Pulteney, p. 54, pl. 17, f. 2. 
Slow streams. 
Extremely doubtful. Pulteney gives no locality, but says 
“if is common in ponds and rivers on Potamogeton and 
other plants.” ] 
VALVATIDA. 
VALVATA, 0. F. Miiller, 1774. 
V. piscinalis (JZill.) Turbo fontinalis, Pult. 
Pulteney, p. 50, pl. 18, £. 3, 4. 
Slow rivers, ponds, ditches. 
Spettisbury, 7. Rachett. 
Kast Lulworth, Kendall. 
Weymouth, Damon. 
Wareham, river below the town, Chamberlaynes, near Bere 
Regis, J. C. AL-P. 
Sturminster Marshall, river Frome, J. C. M.-P. 
Fossil : Blashenwell Quaternary tufaceous deposit, J. C. M.-P. 
