252 
ELEMENTS OF GEOLOGY. 
TABLE OF ENGLISH AND FRENCH EOCENE STRATA. 
UPPER EOCENE. 
English subdivisions. French equivalents. 
A. 1. Bembridge series, Isle of Wight, A. 1. Gypseous series of Montmartre, 
p. 252. p. 270. 
A. 2. Osborne or St. Helen’s series, A. 2 and 3. Calcaire siliceux, or Tra- 
Isle of Wight, p. 255. vertin Inferieur, p. 273. 
A. 3. Headon series. Isle of Wight, 
p. 255. 
A. 4. Barton series. Sands and clays A. 4. Gres de Beauchamp, or Sables 
of Barton Clitf, Hants, p. 258. Moyens, p. 273. 
MIDDLE EOCENE. 
B. 1. Bracklesham series, p. 259. B. 1. Calcaire Grossier, p. 274. 
B. 2. Alum Bay and Bournemouth B. 2. Wanting in France? 
beds, p. 259. 
B. 2. Wanting in England ? B. 2. Soissonnais Sands, or Lits Co- 
quilliers, p. 275. 
LOWER EOCENE. 
C. 1. London Clay, p. 263. C. 1. Argile de Londres, Cassel, near 
Dunkirk. 
C. 2. Woolwich and Reading series, C. 2. Argile plastique and lignite, p. 
р. 267. 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 before stated (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, brack¬ 
ish, and marine origin. Some of the most abundant shells, 
as Cyrena semistriata var., and Paludina lenta^ Fig. 163, p. 
245, 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 Profess¬ 
or Forbes: ' 
a. Upper marls, distinguished by the abundance of Me¬ 
lania turritissima^ Forbes (Fig. 165). 
h. Lower marls, characterized by Gerithium mutahile^ Cy- 
rena pulchra^ etc., and by the remains of Trionyx (see Fig. 
166). 
с. Green marls, often abounding in a peculiar species of 
oyster, and accompanied by Gerithium^ Mytilus^ Arca^ Nu- 
cula^ etc. 
d, Bembridge limestones, compact cream-colored lime¬ 
stones alternating with shales and marls, in all of which 
land-shells are common, especially at Sconce, near Yarmouth, 
