Page:Memoirs of the Geological Survey of Great Britain, Volume 1.djvu/440

Rh, living. Very rare in the British Seas. Common in Arctic Seas and on the banks of Newfoundland.

131. Purpura lapillus (Buccinum sp, Linnæus.

, fossil. Abundant in the sandy (upper) beds of the Irish drift. Common also in England and Scotland. Mammaliferous crag of Bramerton.

, Living in the Celtic, Northern, and Arctic regions of the European Seas. (Replaced in the Lusitanian provinces by Purpura hæmastoma). Greenland; E. coast of America from Florida to the Arctic Seas.

Note. This is one of the most variable of univalve testacea. Well may Dr. Gould remark, that scarcely two specimens can be found alike. I fully agree, after examining long suites of specimens, with Mr. Searles Wood in referring Buccinum crispatum of the Mineral Conchology, and the Murex angulatus, M. lapilliformis, and M. compressus, of Woodward, to this species; nor does the Purpura incrassata of Sowerby appear to be more than a variety. It is probable that the Purpura lapillus is of American origin, and that it was introduced to the European shores during the course of events which brought about the peculiarities of the Pleistocene epoch.

132. Nassa monensis, Forbes.

, fossil. In the pleistocene beds of the north of the Isle of Man. Described by Mr. Strickland in the fourth volume of the 'Proceedings of the Geological Society.' Not known as a living species.

133. Nassa pliocena, Strickland.

, fossil. In the pleistocene beds of the north of the Isle of Man. Described by Mr. Strickland in the fourth volume of the 'Proceedings of the Geological Society.' Not known as a living species.

134. Nassa reticulata, Linnæus.

, fossil. In the Scotch, Manx, Lancashire, and Irish beds.

Loc., living' Throughout the Northern, Celtic, and Lusitanian regions of the European Seas.

135. Nassa semistriata, Brocchi.

, Buccinum labiosum, Sowerby.

In the Wexford beds.

, living. In the depths of the Ægean.

Note. This is a very abundant tertiary fossil in the miocene beds of Touraine, &c. It is found in the coralline and red crag, and occurs in the Newer Pliocene beds of Sicily and Rhodes.

136. Nassa granulata, Sowerby (M. C).

, fossil. In the mammaliferous crag of Bramerton. In Ireland, at Killiney.

Note. A red crag fossil.

137. Nassa incrassata (Tritonium sp.), Muller.

, Nassa macula (Buccinum sp.), Montagu.

, fossil. Common in all the glacial beds of Britain and Ireland.

, living. In the Northern, Celtic, and Lusitanian regions of the European Seas, but chiefly in the two first. It ranges to Madeira.

Note, A red crag fossil.