[The basal portion of a Cypræa as large as Cypræa moneta has been brought to Captain James as having been found in the Wexford drift. As, however, there is something about its aspect which renders it doubtful whether it be not a fragment of a recent shell, I think it better to give merely this notice of it for the present.]
143. Natica monilifera, Lamarck.
Syn. Natica glaucina of British authors. Perhaps identical with N. castanea of Lamarck. Natica glaucinoides of Sowerby (M. C.), not of Deshayes, as pointed out by Mr. Searles Wood, who has named the crag fossil N. catenoides, I am induced to regard the crag and drift forms as one species, and as identical with the living British monilifera. The furrow round the spire is certainly owing to a process of decortication produced during decay. N. fragilis, Smith, appears to me to be the same much decayed.
Loc., fossil. In the Scotch, English, Manx, and Irish glacial beds, frequent. In the mammaliferous crag at Bramerton. [Sweden.]
Loc., living. In the Celtic and Northern (and Lusitanian) regions of the European Seas.
Note. In both the coralline and red crag.
144. Natica sp. nov.? (Bowerbankii, Forbes, MSS.)
In Mr. Bowerbank's Bridlington collection there is an imperfect specimen of a very distinct species of Natica, which does not agree with any living or fossil species known to me. It has a smooth ventricose body whorl, angulated above, and a depressed spire. It equals the Natica monilifera in size.
145. Natica Alderi, Forbes.
Syn. Natica catena of many British authors. Natica anglica of some catalogues.
Loc., fossil. Scottish and Irish drifts.
Loc., living. Northern, Celtic, and Lusitanian regions of the European Seas.
Note. A red crag fossil.
146. Natica helicoides, Johnston.
Loc., fossil. In the mammaliferous crag of Bramerton.
Loc., living. Seas of the north and east of Scotland.
Note. A red crag species. Much more plentiful fossil than recent.
147. Natica clausa, Broderip and Sowerby.
Syn., Natica consolidata, Couthouy.
Natica septentrionalis, Beck.
Loc., fossil. Scottish, Manx, Irish, and North of England glacial beds. Bridlington (Sweden, Russia, Canada).
Loc., living. Arctic Seas and seas of Boreal America.
Note. This fossil occurs in the red crag.
148. Natica groenlandica, Beck.
Loc., fossil, Bridlington.
Loc., living. Seas of Greenland. Extremely rare in the British Seas.
149. Natica Smithii (Bulbus sp.), Brown.
Loc., fossil. The only specimen ever met with of this most interesting
