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TROCHUS. 57 
found living in company, but always preserving their dis- 
tinctive features. 
British distribution.—Southern and western coasts as far 
north as Skye, and all round Ireland. It has not yet been 
found on the eastern or north-eastern coasts in a living 
state. 
Foreign localities —F rom northern and western France 
to Vigo Bay (Andrew). The Gulf of Lyons (Martin) 
and Black Sea (Middendor ff ) are also given in Brit. Con. 
Trochus lineatus, Da Costa. 
Turbo lineatus, Da Costa ; Trochus crassus, Pulteney. 
Habitat—Dead shells and fragments are occasionally 
dredged off the Battery, Cumbrae—doubtless washed out of 
a raised beach. Mr. Robertson has also taken it under 
similar conditions. There is little doubt that this species 
no longer exists in our Firth. 
Its distribution is entirely southern, being apparently con- 
fined in British waters to the Channel Islands, and the 
western part of the English Channel, extending to the north- 
ward as far as Wales. In Ireland it occurs in the south 
and west, reaching on the western side as far north as 
Donegal. 
Abroad it ranges from northern France (De Gerville) 
along the Atlantic coasts as far as Mogador (M‘Andrew), 
and is recorded from the Gulf of Lyons and the Adriatic 
(Jeffreys). 
Trochus Montacuti, Wm. Wood. 
Trochus Montagui, W. Wood; Trochus striatus, Forbes; 
Montagua Danmoniensis, Leach. 
Habitat—On the Tan Spit, Cumbrae, and off Otter, Loch 
Fyne, I have taken a few dead specimens, and Mr. Norman 
has taken it in the former locality also dead. 
British distribution.—Apparently somewhat local. but 
generally distributed. It is recorded from many localities 
in the English Channel and Irish Sea, and on the west and 
north of Scotland. On the east coast it has been found off 
Aberdeenshire and Yorkshire, as well as on the Dogger Bank 
(Leckenby and Marshall). 
Foreign localities.—Northern France (Macé, and others), 
Spain, Portugal, and both sides of the Mediterranean as far 
as Sicily (M‘Andrew). 
E 
