48 THE MOLLUSCA OF THE FIRTH OF CLYDE. 
in company with Chiton cinereus, but scarce, and generally 
small. I have taken it outside the Tan Spit in Cumbrae, 
and off Moll Dhu, Loch Fyne. Mr. Norman reports it from 
Lamlash Bay, between Clachland Point and Holy Island, 
but not common. 
British distribution—Chiefly in the Laminarian zone, 
round nearly all our shores. It is frequent on the northern, 
western, and southern coasts, and on the east is reported 
from St. Andrews (between tide-marks) by Dr. M‘Intosh ; 
Dunbar (Laskey), Northumberland “at low water-mark, 
frequent ” (Alde7’). 
Foreign localities—Throughout the Arctic and Northern 
Seas of both hemispheres, as far south as Denmark and the 
Channel in Europe, and Cape Cod in America. 
Chiton levis, Montagu. 
Chiton achatinus, Brown (probably not Chiton levis of 
Pennant, which=C. ruber). 
Habitat—Scarce from lowest water of spring tides at 
Farland Point, Cumbrae, down to 8 or 10 fathoms off Shell- 
bole Bay. I have not noted other localities. 
British distribution—tThis species has been noticed at 
very many stations all round our coasts, but is nowhere 
- common. The following may be recorded :—Coast of Devon 
(Hanley, and others), Isle of Man (Forbes), Orkney and 
Shetland (M‘Andrew), Oban and Loch Long (Barlee), St. 
Andrews—rare, but large—(M‘Intosh) Northumberland 
(Alder). 
Foreign localities—Norway (Lovén, and others), Spain, 
Portugal, and Algiers (M‘Andrew), Mediterranean and 
Agean (Forbes, and others). 
* Chiton marmoreus, O. Fabricius. 
Chiton punctatus, Strdém; Chiton levigatus, Fleming ; 
Chiton fulminatus, Couthouwy. 
Habitat—On clean stones in 5 to 7 fathoms on ‘Toward 
and Bogany Points, and off Ascog and St. Ninians in Bute. 
On Skelmorlie Bank, off Skelmorlie, and in shallow water 
near the Tan Buoy, Cumbrae—the largest specimens being 
got off Toward Point. 
British distribution.—Locally distributed on both sides 
of Scotland. In the east of England it has been found on 
the Northumberland coast by Embleton and Hanley (Alder, 
as C, leevigatus), and by Bean at Scarborough. In Ireland 
