83 
8. 
85. 
86. 
87. 
24 THE MOLLUSCA OF DORSETSHIRE. 
. P. albus, Mill. Helix alba, Mont. 
Pulteney, p. 53, pl. 19, f. 18. 
Marshes, ponds, ditches, 
Generally distributed. 
P. spirorbis (M/ul.) Helix spirorbis, L. 
Pulteney, p. 53, pl. 20, f. 17. 
On plants in shallow and stagnant water. 
Generally distributed. 
P. vortex (Z.) Helix vortex, L. 
Pulteney, p. 52, pl. 20, f. 12. Purbeck Papers, Vol. ii. 
p. 47. 
On water-plants in shallow water. 
Generally distributed. 
Weymouth, Damon. 
Swanage, stream, J. H. Austen. 
Wareham, water-courses, Stoborough Meadows, J. C. AL.-P. 
Chamberlaynes, Bere Regis, J. C. M.-P. 
Spettisbury, river Stour, J. C. M.-P. 
P. carinatus (J@ll.) Helix planata, Maton and Rackett. 
Pulteney, p. 52, pl. 20, f. 18, 
On water-plants, marshes and stagnant water. 
East Stoke ; Woolbridge, river Frome ; Wareham, Stoborough 
Meadows, J. C. M.-P. 
Morden Park ; Chamberlaynes, Bere Regis, J. C. M.-P. 
P. complanatus (Z.) P. marginatus, Drap. Helix 
planorbis, Pult. 
Pulteney, p. 52, pl. 14, f. 8, and pl. 20, f. 10. 
Purbeck Papers, Vol. ii, p. 46. 
Marshes, ponds, and slow streams. 
East Lulworth, Kendall. 
Bryanston, river Stour, J. C. A-P. 
Wareham, water-courses, Stoborough Meadows, J. H. Austen. 
Chamberlaynes, Bere Regis, river, Morden Park Lake, 
J.C. M.-P. 
