Page:Memoirs of the Geological Survey of Great Britain, Volume 1.djvu/424

Rh, living. The Celtic Seas.

Note. Fossil in both coralline and red crag. It inhabited the Mediterranean region during the Glacial epoch, and is found fossil in the Sicilian tertiaries, but no longer exists so far south.

28. Tellina tenuis, Pennant.

, fossil. In the Scotch beds.

, living. Throughout the European Seas. Always littoral, or nearly so.

Note. Appears to date its origin from the Glacial epoch.

29. Tellina bathica, Linnæus.

, Tellina solidula of British authors.

, fossil, Dalmuir. Frequent in the Irish and western English beds; 'Isle of Man, Bridlington, mammaliferous crag of Bramerton. [In the 'Scandinavian beds.]

, living. Throughout the European Seas. In the Black Sea (Krynicki).

Note. First appeared during the Glacial epoch.

30. Tellina groenlandica, Beck.

, fossil. Bute. (Russia, Canada.)

, living. Arctic Seas, Icy Cape. Gulf of St. Lawrence (Captain Bayfield).

31. Tellina calcarea, Gmelin.

T. proxima, Brown. T. ovalis, Woodward. T. ovata and obliqua of the Mineral Conchology, and T. prætenuis of Woodward appear to me to be varieties of this species.

, fossil. Clyde beds. The varieties in the mammaliferous crag at Bramerton and Portwick. [Sweden, Russia, Canada.]

, living. In the Arctic Seas [Deshayes]. Behring's Straits [G. B., Sowerby]. Greenland [Möller].

Note. T obliqua, begins in the coralline, the other varieties in the red crag.

32. Tellina fabula, Gmelin.

, fossil. Maimmaliferous crag of Southwold.

, living. Throughout the European Seas.

33. Lucina flexuosa (Tellina sp.), Montagu.

Venus sinuosa, Donovan. Lucina sinuosa, Lamarck. Cryptodon flexuosum, Turton. Ptychina biplicata, Phillippi.

, fossil, Clyde beds (in situ).

, living. Abundant in the seas of Northern Europe. British Seas. Rare in the Mediterranean. Greenland. Seas of Boreal America.

Note. The Mediterranean variety differs slightly from that found in the Atlantic, and resembles the form fossil in the coralline crag. Nyst includes in this species the "Axinus angulatus," of the Mineral Conchology, a London-clay fossil, which is certainly distinct, though nearly allied. Two fossils were figured in the Mineral Conchology as species of the genus Axinus—the Axinus obscurus (Min. Conch., t. 314), a magnesian limestone fossil, and the eocene Lucina of the subgenus Cryptodon, figured as Axinus angu-