English subdivisions French equivalents A.1. Bembridge series, Isle of Wight, p. 252. A.1. Gypseous series of Montmartre, p. 270. A.2. Osborne or St. Helen’s series, Isle of Wight, p. 255. A.2 and 3. Calcaire siliceux, or Travertin Inférieur, p. 273. A.3. Headon series, Isle of Wight, p. 255. A.4. Barton series. Sands and clays of Barton Cliff, Hants, p. 258. A.4. Grès de Beauchamp, or Sables Moyens, p. 273. MIDDLE EOCENE B.1. Bracklesham series, p. 259. B.1. Calcaire Grossier p. 274 B.2. Alum Bay and Bournemouth beds, p. 259. B.2. Wanting in France? B.2. Wanting in England? B.2. Soissonnais Sands, or Lits Coquilliers, p. 275 LOWER EOCENE C.1. London Clay, p. 263. C.1. Argile de Londres, Cassel, near Dunkirk. C.2. Woolwich and Reading series, p. 267. C.2. Argile plastique and lignite, p. 276 C.3. Thanet sands, p. 269. C.3. Sables de Bracheux, p. 276 UPPER EOCENE, ENGLAND. Bembridge Series, A.1.—These beds are about 120 feet thick, and, as stated in p. 245, lie immediately under the Hempstead beds, near Yarmouth, in the Isle of Wight, being conformable with those Lower Miocene strata. They consist of marls, clays, and limestones of fresh-water, brackish, and marine origin. Some of the most abundant shells, as _Cyrena semistriata_ var., and _Paludina lenta,_ Fig. 163, are common to this and to the overlying Hempstead series; but the majority of the species are distinct. The following are the subdivisions described by the late Professor Forbes: _a._ Upper marls, distinguished by the abundance of _Melania turritissima,_ Forbes (Fig. 165). _b._ Lower marls, characterised by _Cerithium mutabile, Cyrena pulchra,_ etc., and by the remains of _Trionyx_ (see Fig. 166). _c._ Green marls, often abounding in a peculiar species of oyster, and accompanied by _ Cerithium, Mytilus, Arca, nucula,_ etc. _d._ Bembridge limestones, compact cream-coloured limestones alternating with shales and marls, in all of which land-shells are common, especially at Sconce, near Yarmouth, as described by Mr. F. Edwards. The _Bulimus ellipticus,_ Fig. 167, and _Helix occlusa,_ Fig. 168, are among its best known land-shells. _Paludina orbicularis,_ Fig. 169, is also of frequent occurrence. One of the bands is filled with a little globular _Paludina._ Among the fresh-water pulmonifera, _ Lymnea longiscata_ (Fig. 171) and _Planorbis discus_ (Fig. 170) are the most generally distributed: the latter represents or takes the place of the _Planorbis euomphalus_ (see Fig. 175) of the more ancient Headon series. _Chara tuberculata_ (Fig. 172) is the characteristic Bembridge gyrogonite or seed-vessel. Fig. 165: Melania turritissima, Fig. 166: Fragment of Carapace of Trionyx, Fig. 167: Bulimus ellipticus, Fig. 168: Helix occlusa, Fig. 169: Paludina orbicularis, Fig. 170: Planorbis discus, Fig. 171: Lymnea longiscata, Fig. 172: Chara tuberculata.