CARDIUM. 21 
* Cardium fasciatum, Monagu. 
Cardium elongatum, 7uwrton; Cardium exiguum, Macgil- 
livray. 
Habitat—tThis species may be obtained nearly every- 
where throughout the district, in 5 to 30 fathoms, in sandy 
gravel with an admixture of mud. It is very common at 
Bogany, Craigmore, and Ascog, Bute; on Tan Spit and west 
side of the two Cumbraes ; and in Loch Fyne, off Silvereraigs 
and Otter. Specimens more globose than the type some- 
times occur. These may be the variety globosa. 
British distribution. — Throughout the British Isles 
common. 
Foreign localities—From Iceland (Verkriizen), through- 
out northern and western Europe, and as far as the Canary 
Islands (M‘Andrew), Mediterranean (Naves, Jeffreys, and 
others). 
Cardium nodosum, Z'urton. 
Cardium roseum, Lamarck (not C. nodosum, Montagw). 
Habitat.—Scarce on gravelly bottom, from 10 to 25 fathoms, 
at Bogany Point and Ascog, in Bute; and off the Battery, 
Cumbrae. Only one or two specimens were obtained at each 
locality; Mr. Norman, however, reports it as “ by no means 
uncommon” at Shell Bay, Cumbrae; Largs; Lamlash Bay, and 
between that and Corriegills, Arran. 
British distribution.—Generally diffused throughout our 
seas; rather a scarce species; but it is locally common in 
various districts. 
Foreign localities —Norway (Lovén, and others), northern 
and western France (Jeffreys), and both sides of the Medi- 
terranean as far as Sicily (Philipp). 
* Cardium edule, Linné. 
Pectunculus vulgaris, Lister ; Cardium vulgare, Da Costa. 
Habitat—Gregarious and abundant in sandy bays, from 
half tide downward. It seems to prefer a mixture of gravel 
with sand; and flourishes best where a small fresh water 
stream percolates the beach, rendering the water more or 
less brackish. In this district there are many beds, from 
which considerable quantities of this common shell are 
collected for sale in the large towns. I may specify 
such beds:—at Ardentinny, in Loch Long; at Kamesburgh 
and Ettrick Bays, Bute; at Lochgilphead, Argyleshire ; as 
