The Quarterly journal of the Geological Society of London . r Almasand Brejo Grande (270 to 320 kilom. west and south-west of Bahia).In places (as, for example, at Itacaranha), pieces of wood in jet-like 1 On the Discovery of some Fossil Remains near Bahia in South AmericaQuart. Journ. Geol. Soc. vol. xvi (1860) pp. 263-68 & pis. xiv-xvii (with noteson the fish-remains by Sir Philip Egerton, on the mollusca by Prof. J. Morris,and on the entomostraca by Prof. T. Rupert Jones). 2 Geology & Physical Geography of Brazil Boston & London, 1870,pp. 346-60, 555. 3 A Bacia Cretacea da Bahia de Toclos o
The Quarterly journal of the Geological Society of London . r Almasand Brejo Grande (270 to 320 kilom. west and south-west of Bahia).In places (as, for example, at Itacaranha), pieces of wood in jet-like 1 On the Discovery of some Fossil Remains near Bahia in South AmericaQuart. Journ. Geol. Soc. vol. xvi (1860) pp. 263-68 & pis. xiv-xvii (with noteson the fish-remains by Sir Philip Egerton, on the mollusca by Prof. J. Morris,and on the entomostraca by Prof. T. Rupert Jones). 2 Geology & Physical Geography of Brazil Boston & London, 1870,pp. 346-60, 555. 3 A Bacia Cretacea da Bahia de Toclos os Santos Archiv. Mus. Nac. Riode Janeiro, vol. iii (1878) pp. 135-58, with map (pi. xii). Yol. ] CRETACEOUS FORMATION OF BAHIA. 129 condition are mingled with the pebbles, as already observed byDr. Derby. The sandstones sometimes exhibit ripple-markedsurfaces, as at Pedra Furada and Periperi. There are also, bothin the sandstone and in the shales, small patches of bone-bed, Map slioiving the localities where Cretaceous fossils ivere containing not only the scattered remains of fishes, but well-rolledpieces of reptilian bones; a particularly-noteworthy bed at SanThiago rests upon a shell-bearing layer. The shales are oftencalcareous, and contain both hard concretions and soft muddypockets ; some are also impregnated with oil. 130 ME. J. MAWSOX OX THE [-^aV 19°7t The precise extent and boundaries of the Cretaceous basin ofBahia still remain to be determined, but the accompanying sketch-map (p. 129) bears the names of all the localities at which I havediscovered the typical fossils of the formation. A few notes onsome of the sections are appended. Montserrat, Pedra Furada, and Bomfim.—The generalfeatures of this section have already been sufficiently described byAllport. Gasteropod-shells are commonest and best preserved inthe ridges of sandstone at various points, and in the hard, fine-grained, brownish limestone near Pedra Furada. Scales of Lepi-dotiis and fragmen
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