Among the fresh-water
pulmonifera, Lymnea longiscata (Figure 171) and Planorbis discus (Figure 170)
are the most generally distributed: the latter represents or takes the place of
the Planorbis euomphalus (see Figure 175) of the more ancient Headon series.
Chara tuberculata (Figure 172) is the characteristic Bembridge gyrogonite or
seed-vessel.
(FIGURE 173. Anoplotherium commune. Binstead, Isle of Wight.
Lower molar tooth, natural size.)
(FIGURE 174. Palaeotherium magnum, Cuvier.)
(FIGURE 175. Planorbis euomphalus, Sowerby. Headon Hill. 1/2 diameter.)
From this formation on the shores of Whitecliff Bay, Dr. Mantell obtained a fine
specimen of a fan palm, Flabellaria Lamanonis, Brong., a plant first obtained
from beds of corresponding age in the suburbs of Paris. The well-known building-
stone of Binstead, near Ryde, a limestone with numerous hollows caused by
Cyrenae which have disappeared and left the moulds of their shells, belongs to
this subdivision of the Bembridge series. In the same Binstead stone Mr. Pratt
and the Reverend Darwin Fox first discovered the remains of mammalia
characteristic of the gypseous series of Paris, as Palaeotherium magnum (Figure
174), Palaeotherium medium, Palaeotherium minus, Palaeotherium minimum,
Palaeotherium curtum, Palaeotherium crassum; also Anoplotherium commune (Figure
173), Anoplotherium secundarium, Dichobune cervinum, and Chaeropotamus Cuvieri.
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