20 THE MOLLUSCA OF THE FIRTH OF CLYDE. 
above it, at Battery Point, Cumbrae. This is the only locality 
I happen to have noted; but it is probably more or less 
common on all suitable ground in the district. Mr. Norman 
has taken it both in Cumbrae and Arran “in some 
plenty.” 
British distribution.—Throughout our seas, in the littoral 
and laminarian zones, in sheltered situations. 
Foreign localities.—Greenland (Fabricius), Massachusetts 
(Stimpson), Norway (Lovén), northern France (Macé, and 
others), Mediterranean (Jeffreys). 
FamiLty Carpup&, Broderip. 
Carpium, Linné. 
* Cardium echinatum, Linné. 
Cardium parvum (young), Da Costa. 
Habitat—Sand and gravel, in 6 to 20 fathoms; not 
uncommon, and generally distributed throughout the dis- 
trict. I have taken this fine, though common shell, living, 
on Bogany Point, Toward Point, and off Craigmore and 
Ascog in Bute; on Tan Spit and off Fintry Bay, Cumbrae ; 
and in Loch Fyne. Mr. Norman has taken it in Lamlash 
Bay. The shells, when adult, are usually coated with a 
ferruginous deposit. 
British distribution. — Common throughout all our 
seas. 
Foreign localities—Everywhere from Greenland (Fabri- 
cvus) and Iceland (Verkriizen) to the Canaries (M‘Andrew), 
as well as throughout the Mediterranean and Aigean Seas 
and Sea of Marmora (Forbes, and others). 
* Cardium exiguum, Gmelin. 
Cardium pygmeum, Donovan. 
Habitat.—On soft dirty ground, in 6 to 8 fathoms; scarce. 
Ihave taken it off “the Hawk,” Little Cumbrae; outside Tan 
Spit, Cumbrae; at Bogany Point, Bute; and off Otter, Loch 
Fyne: only one or two specimens from each locality. 
British distribution. — General throughout the British 
Isles ; but probably abundant nowhere. 
Foreign localities—From Norway and Sweden (Sars, and 
others) to northern France, Spain, Portugal, throughout 
the Mediterranean, and as far as the Black Sea (Midden- 
dorff). 
