152. 
153. 
154. 
THE MOLILUSCA OF DORSETSHIRE. 41 
NERITOIDES, Brown, 1827. 
N. obtusata (Z.) Littorina littoralis (Z.) L. obtu- 
sata (L.) 
Pult., p. 57, 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 (Turton). 
Inhabits the Laminarian zone. 
Between Studland and South Haven, J. £. Cooper. 
Weymouth, Damon. 
Kimmeridge Bay, J. C. M.-P. 
Fossil : Raised beach, Portland, Prestwich. 
L. crassior (Mont.) 
Weymouth, dredged, W. Thompson. Moderately plentiful, 
alive in 6 to 7 fathoms, a few at extreme low-tides, Z. R. 
Sykes. 
Shore between Studland and South Haven, J. £. Cooper. 
Kimmeridge Bay, east side, St. Alban’s Head, shelly sea- 
bottom, J. C. M.-P. 
. L. divaricata (Fabr.) L. vineta, Mont. 
Inhabits the Laminarian zone. 
Weymouth, W. Thompson. 
Studland Bay, J. C. M-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. eymouth, Damon. 
Luiworth Cove, 4. R. Sykes. 
Between Studland and South Haven, thrown up on the 
shore, J. C. M.-P. 
Fossil : Raised Beach, Portland, E. R. & yes. 
