204. 
THE MOLLUSCA OF DORSETSHIRE. ao 
. O. nivosa (Mont.) O. cylindrica, Alder. 
Inhabits the lower Littoral and upper Laminarian zones. 
Portland, under stones, EZ. R. Sykes. 
0. acuta, Jeffreys. 
Inhabits the Coralline zone. 
Shell conic, smooth, shining, slightly transparent, stained 
with a veinous flesh-colour. 
Brit. Conch. Vol. iv., p. 130. 
Weymouth, Damon, EH. R. Sykes. 
. O. pallida (Mont.) 0. eulimoides, Hanley. 
Forbes and Hanley, Vol. iii., p. 273, p. 95, £. 1-3. 
Lives on valves of Pecten opercularis, Coralline zone. 
Abounds on the coast of Dorset, Forbes and Hanley. 
Weymouth, Damon. 
. O. conoidea (Lrocchi.) 
Forbes and Hanley, Vol. ili., p. 260, pl. 95, f. 4. Brit. 
Conch., Vol. iv., p. 128. 
Weymouth, #. Forbes. 
Poole Harbour, near the Powder House (alive), Dr. Turner. 
. O. unidentata (Mont.) 
A solid little shell, smooth, glossy, and very little trans- 
parent. 
It bears the generai aspect of Paludestrina ulve. 
Weymouth, dredged, W. Thompson. 
. 0. turrita, Hanley. O. unidentata, var., Forbes and 
Hanley. 
Brit. Conch., Vol. iv., 135. 
Remarkably long and thin, differing from any other known 
Odostomia. 
Placed by Forbes provisionally as a variety of O. unidentata. 
Under stones, and in rock-pools at low-water mark of spring- 
tides; on old oysters, and Pecten maximus, Laminarian 
and Coralline zones. 
Weymouth, Damon. 
