230. 
231. 
234. 
THE MOLLUSCA OF DORSETSHIRE. 59 
C. exasperatum (Penn.) Trochus exiguus, Pull. 
Brit. Conch., Vol. iii., p. 324. Forbes and Hanley, Vol. ii., 
p. 505, pl. 66, f. 11, 12. Pulteney, p. 48, pl. 21, f. 4. 
Lulworth, dredged, 7 and 12 fathoms, G. Jeffreys. 
Weymouth Bay, 7 fathoms (alive), McAndrew and 
E. Forbes. 
Shore between Stydland and South Haven, Carleton Green. 
Kimmeridge Bay, dredged alive, J. C. IL-P. 
C. striatum (Z.) Trochus striatus, L. 
T. erythroleucos, Pult. 
Pulteney, p. 48, pl. 18, f. 2. 
Inhabits the Laminarian zone. It does not reach as far 
north as Scotland. 
Weymouth, Damon. Common among sea-weed, Z. R. Syies. 
Kimmeridge Bay, dredged, J. C. AL-P. 
2, C. Montagui, (Wood). Trochus Montagui, Gray. 
Trochus Montacuti, Wood. 
Forbes and Hanley, Vol. ii., p. 511, pl. 65, f. 10, 11. 
Portland, West Bay, dredged from 7 to 20 fathoms, 
McAndrew and E. Forbes. 
Weymouth Bay, very plentiful, W. Thompson. 
Kimmeridge Bay, dredged at various depths, J. C. M.-P. 
Fossil : Coralline and Red Crags. 
CYCLOSTREMATIDZ. 
CYCLOSTREMA, Marryat, 1818. 
. C. serpuloides (Mont.) Skenea divisa, Fleming. 
Forbes and Hanley, Vol. iii., p. 161, pl. 74, f. 4, 5, 6. 
Inhabits the lower Laminarian and the upper Coralline zones. 
Weymouth, Jeffreys. 
C. Cutlerianum (Clark.) 
Brit. Conch., Vol., iii., p. 287. 
Inhabits the Coralline zone. 
An extremely rare shell. 
Lulworth, Jeffreys. 
