245. 
THE MOLLUSCA OF DORSETSHIRE. 63 
ACANTHOCHITES, Risso, 1826. 
A. fascicularis (Z.) Chiton fascicularis, Z. 
Brite Conch, Vol. ii, p. 211; Pulteney, p. 25; pla 1) fs 1 
Under stones and on shells, at depths ranging from low- 
water-mark to 20 fathoms. 
Poole, on oyster shells, not uncommon, Pulteney. 
Weymouth, plentiful between tide-marks, W. Thompson, 
iy. R. Sykes. 
Lyme Regis, J. W. Cundall. 
Kimmeridge Bay, abundant from the shore to deep water, 
JS CME P. 
. gracilis, Jeff. 
Lulworth, Jeffreys. 
Weymouth, Metcalfe and Damon. 
Fossil : Coralline Crag, Suffolk. 
. A. diserepans (Brown). Chiton discrepans, Brown. 
Sheil larger. The margin is very broad, more so than in the 
preceding, and more dilated. 
On rocks and stones from low-water-mark to 25 fathoms. 
Weymouth, Damon. 
DENTALIIDZ. 
DENTALIUM, L. 
.D. vulgare, Da Costa. OD. Tarentinum, Lamarck. 
D. entalis, Z. (in part). 
Forbes and Hanley, Vol. ii., p. 451, pl. 57, f. 12. 
Pulteney, p. 59, pl. 22, f. 10. 
A southern British shell, in contrast to D. entalis, which 
must be regarded as a northern type. 
Weymouth, Damon, HK. R. Syles. 
Studland Bay, thrown up by the sea (alive), J. C. M.-P. 
Kimmeridge Bay, dredged (alive), more common on the 
western side of the Bay (Gadcliff), J. C. IL-P. 
