de Lille, 3. Ser. XI. 1872, p. 368. S1 ) On the possible extension of the coal measures beneath the South - Eastern part of England; Quart. Journ. XII, p. 38—jZ; pi, I, s8 ) Eb. das. p. 62. 99) Transact. Geol. Soc, Vol. VII, 1845— 56. 90) Vergi, Profil bei Whitaker, The geology of the London Basin: Mem. Geol. Survey, 1872, IV, p. 376. 91 ) Manual of Geology, 1855, p. 445. 92 ) Whitaker, eb. das, p, 344; Prestwich in vielen vortrefflichen Schriften, 93} Whitaker, Quart. Journ. 1871, XXV11