44 THE MOLLUSCA OF DORSETSHIRE. 
166, R. membranacea (Adams). R. labiosa, Pult. 
Pulteney, p. 49, pl. 18, f. 16. Forbes and Hanley, Vol. iii., 
p. 109, pl. 76, £.5, pl. 77, f. 1, 2,3. Brit. Conch., Vol. iv., 
. 32. 
Weymouth, Barlee. 
Fleet, Wyke Regis, abundant, W. Thompson, 
Poole, ZT. Rackett. 
Swanage Bay, dredged, J. C. M.-P. 
Var. minor, Jeffreys. 
Weymouth, Barlee. 
Several interesting varieties found near the mouth of the 
Fleet, H.R. Sykes, and as high up as the Swannery, 
J.C. M.-P. 
167. R. violacea (Desmarets.) R. rufilabrum (Leach), Alder. 
Brit. Conch., Vol. iv., 34. 
Inhabits the Laminarian zone. 
Weymouth, Damon, E. R. Sykes. 
Swanage, J. £. Cooper. 
168. R. costulata, Ald. 
Forbes and Hanley, Vol. iii., p. 103, pl. 77, £. 4, 5. 
Brit. Conch., Vol. iv., p. 36. 
Weymouth, Jeffreys, E. R. Sykes. 
Lulworth, Jeffreys. 
Kimmeridge Bay, shore-sand, J. C. M.-P. 
Challenger Expedition, Madeira. 
Fossil : Middle Pliocene. 
169. R. striata (Adams.) 
Inhabits stones and muddy places between tide-narks and in 
the Laminarian zone. 
Weymouth, Damon. 
Swanage, J. E. Cooper. 
Studland, Old Harry, dredged, Dr. Turner. 
Kimmeridge Bay, dredged at several depths, J. C. M.-P. 
Fossil: Raised Beach, Portland, Prestwich. Coralline Crag. 
