152. 
153. 
154. 
THE MOLILUSCA OF DORSETSHIRE. 4] 
NERITOIDES, Brown, 1827. 
N. obtusata (Z.) Littorina littoralis (Z.) L. obtu- 
sata (L.) 
Pulte p: 07, pl. 16, f. 13-16, and pl..20; f. 2, 3. 
Generally distributed round the coast. 
Fossil: Raised beach, Portland, Prestwich. Blashenwell, 
Quaternary tufaceous deposit. 
LACUNA, Turton, 1827. 
L. puteolus (Z'urton). 
Inhabits the Laminarian zone, 
Between Studland and South Haven, J. EL. Cooper. 
Weymouth, Damon. 
Kimmeridge Bay, J. C. M.-P. 
Fossil ;: Raised beach, Portland, Prestwich. 
L. ecrassior (Mont.) 
Weymouth, dredged, W. Thompson. Moderately plentiful, 
alive in 6 to 7 fathoms, a few at extreme low-tides, H. R. 
Sykes. 
Shore between Studland and South Haven, J. LH. Cooper. 
Kimmeridge Bay, east side, St. Alban’s Head, shelly sea- 
bottom, J. C. M.-P. 
. L. divarieata (Fabr.) L. vineta, Wont. 
Inhabits the Laminarian zone. 
Weymouth, W. Thompson. 
Studland Bay, J. C. IL-P. 
. L. pallidula (Da Costa). Nerita pallidula, Da Costa. 
Pulteney, p. 57, pl. 20, f. 4,5. Da Costa, p. 51; recorded 
by him from Dorsetshire. 
Whitenose, dredged, W. Thompson. Weymouth, Damon. 
Luiworth Cove, #. R. Sykes. 
Between Studland and South Haven, thrown up on the 
shore, J. C. M.-P. 
Fossil: Raised Beach, Portland, £. R. Sykes. 
