48 THE MOLLUSCA OF DORSETSHIRE. 
182. V. eristata, Will. 
Ponds, ditches, and slow streams, 
Chamberlaynes, J. C. M.-P. 
PALUDINELLA, Pfeifer, 1841. 
183. P. littorina (Delle Chiaje). Helix littorina, Delle 
Chiaje. 
Forbes and Hanley, Vol. iii., p. 132, pl. 81, f. 6, 7. 
Brit, Conch., Vol.v.,p. LOW 
Under stones among seaweed. 
Weymouth, inside the Chesil Bank, Jetcalfe. 
Var. albina, £. R. Sykes. 
Portland, L. R. Sykes. 
Poole Harbour, among seaweed, J. C. M.-P. 
TRUNCATELLIDA. 
TRUNCATELLA, Jisso, 1826. 
184. T. subeylindrica (Z.) T. Montagui, Lowe. Helix 
subcylindrica, Z. Turbo truncatus, Mont. 
Pulteney, p. 51, pl. 19, f. 8. 
An influx of fresh water appears to be essential for this shell. 
Portland, S. Hanley ; an isolated spot under deeply buried 
stones at high-water-mark (alive), H. 2. Sykes. 
Fleet (alive), W. Thompson; shore opposite Wyke, cast up 
dead at high-water-mark, S. Hanley, J. C. M.-P. 
POMATIASIDA. 
This and the next are the only two British land-shells 
furnished with an operculum. 
POMATIAS, Studer, 1789. 
185. P. elegans (Jill.) Cyclostoma elegans, Vill. 
Pulteney, p. 50, pl. 21, f. 9. 
Under stones, hedge-banks, rocks, roots of brush wood, 
Generally distributed. 
