1859.] 



ALLPOET FOSSILS FliOM BAHIA. 



265 



S.W. point of the hill on which the fort of Montserrate is built 

 presents to view several alternations of conglomerate, sandstone, and 

 shale (see Section, fig. 3). Towards the N.E., these beds pass into 



Fig. 3. — Section of the Cliff at Montserrate. (The detached Section 



is about 25 yards eastward of the Fort.) 

 w. E. 



Fort Montserrate. 



a. Conglomerate. b. Sandstone. 



■&-*■** 



ffi - * 



c. Sandy shale, with fossils. 



a gritty shale, of a bluish-grey colour, and full of pebbles ; the latter 

 gradually disappear, and the upper strata, as far as the seaward 

 exposed portion extends, consists of beds of shale, alternating with 

 bands of sandstone, both of which contain the same species of fossil 

 shells. The entire series of these deposits are covered with the 

 usual red loam, and have the general inclination to the X .\V. 



The seaward exposed portion of the cliff of Montserrate, about 

 30 feet in height, consists chiefly of conglomerate, with irregular 

 wedge-shaped bands of shale and clay, and also bands of sandstone. 

 The conglomerate is composed of more or less rounded pebbles of 

 gneiss, granite, quartz, and other crystalline rocks, and occasionally 

 of sandstone ; the whole forming an extremely hard rock. The 

 pebbles vary in size from the finest gravel to large boulders. 



In the shale near the base of the cliff were found the fossils about 

 to be noticed (sec Plates XIV. XVI. & XVII.), consisting chiefly of 

 scales and other portions of Fish, bones and teeth of Saurians, 

 together with Lignite, a few MnlJusca, and some /•Juttu/iox/raca. 



Two miles from the above hill, in a N.E. direction, is the 1'lanta- 

 forma (see fig. 1 and fig. 2), another hill of the same formation, but 

 loftier; the conglomerates and shales have here the same lithologieal 

 character, and in the latter are found several fossils (Plate XV.) 

 similar to those found at Bfontserrate. 



The geological position of the above formations is undetermined, 

 as they have not been braced iii connexion with other deposits; but 

 a probable inference ma] perhaps be made from an examination of 



the fossil remains. 



Notes on tfu Fossm/rom Bahia. 



With regard to the Kish-ivmains, Sir 1\ Egerton, Hart.. P.G.S., to 

 whom the specimens have been submitted, states thai "the scales 

 are those of Lepidotus. The species appears to be a new one. Tie 



