Loc., living. In the Northern and Celtic Seas, and Seas of Boreal America.
Note. During the Glacial epoch the range of this well known mollusk extended to the Mediterranean region, where it is found fossil in the newer pliocene beds of Sicily (Phillippi).
45. Cardita scalaris (Venericardia sp.), Sowerby.
Loc., fossil. Bridlington beds.
Note. This species lived during both the preceding crag epochs. The existence of a species of Cardita in the ancient glacial seas of Europe, is paralleled by the presence of a species of the same genus (Cardita arctica) in the seas of Boreal America at the present day.
46. Cardita corbis, Phillippi.
Loc., fossil. In the mammaliferous crag of Southwold (identified by Mr. Searles Wood). In the Campinian beds of Belgium, according to M. Nyst, and present in both coralline and red crag British formations).
Loc., living. The Mediterranean Sea.
47. Artemis exoleta (Venus sp.), Linnæus.
Syn. Cytherea exoleta, Lamarck.
Loc., fossil. In the glacial beds of Scotland, Ireland, Isle of Man, and north of England.
Loc., living. General in the European Seas. Ranges as far south as Senegal (Adamson), is found in the Red Sea, according to Phillippi.
48. Artemis lincta (Venus sp.), Pulteney.
Loc., fossil. Dalmuir (Mr. Smith.)
Loc., living. Celtic and Northern Seas of Europe. The Mediteranean (and Red Sea?) forms belong to Artemis lupinus (Cytherea sp.) of Lamarck.
Is not the Artemis Phillippii of Agassiz ('Iconographie des Coquilles Tertiaires'), also the last-named species?
Note. Artemis lincta is enumerated as a Bordeaux fossil by Basterot; but Professor Agassiz maintains that the Bordeaux form is distinct, and names it A. Basterotii.
49. Venus (Pullastra) decussata, Linnæus.
Loc., fossil. Scotch and Irish beds.
Loc., living. Celtic and South-European Seas. A Red Sea shell according to Philippi.
Note. Not known fossil before the Newer Pliocene epoch. Its probable specific centre was then, as now, in the Lusitanian Seas.
50. Venus (Pullastra) pullastra, "Wood.
Syn., Venerupis pullastra, Fleming. Pullastra vulgaris, G Sowerby.
Loc., fossil. Clyde beds.
Loc., living. Celtic and Scandinavian Seas.
51. Venus (Pullastra) aurea, Linnæus.
Loc., fossil. Near Dublin.
Loc., living. Celtic and South-European Seas.
Note. Neither of the two preceding species are known in beds of older date than the Newer Pliocene epoch.
