52. Venus (Dosina) fasciata, Montagu.
Syn., Venus Brogniartii, Payraudeau.
Loc., fossil. Ireland. Mammaliferous crag of Bramerton.
Loc., living. Celtic and South-European Seas.
Note. Appeared in the British Seas during the Coralline Crag epoch, and has continued ever since. It is now, as anciently, chiefly developed in the Celtic region, from part of which it appears to have been banished during the Glacial epoch.
53. Venus (Pullastra) virginea, Linnæus.
Loc., fossil. Scotland and Ireland.
Loc., living. Throughout the European Seas, but most plentiful in the Celtic region.
Note. Occurs in the red crag.
54. Venus ovata, Pennant.
Syn., Venus pectinula, Lamarck. Venus radiata, Brocchi.
Loc., fossil. Irish and Scotch beds.
Loc., living. Throughout the European Seas, but chiefly abundant in the Celtic and Northern regions. In the Mediterranean it is found for the most part at great depths.
Note. Appeared in our area during the Coralline Crag epoch, and never departed.
55. Venus verrucosa, Linnæus.
Loc., fossil. Among Captain James's Wexford specimens are worn fragments of a Venus, probably of this species; though it would be difficult to distinguish them from similar portions of the crag Venus turgida, or the American Venus mercenaria.
Loc., living. In the southern part of the Celtic region, and throughout the Lusitanian and Mediterranean provinces, where its true centre seems to be. Philippi enumerates it among Ehrenberg and Hemprich's Red Sea shells. Mr. Webb procured it at the Canaries.
Note. It is not known as a British fossil before the Glacial epoch.
56. Venus gallina, Linnæus.
Loc., fossil. In the Irish, English, and Scotch beds, especially in such as indicate their having been deposited as sand in shallow water.
Loc., living. Throughout the European Seas. In the Black Sea, and, it is said, in the Caspian.
Note. Not known fossil in Britain before the Glacial epoch.
57. Venus casina, Linnæus.
Syn., Venus reflexa (young shell).
Loc., fossil Common in the Manx beds, and also found in Ireland and North of England.
Loc., living. Abundant in the Celtic Seas, especially toward the North. Inhabits the South-European Seas, but is very rare, and probably found its way into the Mediterranean during the Glacial or Newer Pliocene epoch, in the sea beds of which it is frequently found fossil. I have found it abundantly
