Professor Buckland on the Bones of Mastodon, Sgcfrom Ava. 387 



Ancillaria ") Lamarck, Environs de Paris. Only found in London clay 

 Murex J and calcaire grossier. 

 Cerithium ") _ . , 

 Oliva j ^°"^^" '^^>^- 



Astarte rugata. (Min. Conch.) London clay and calcaire grossier. 



Nucula rugosa. London clay and calcaire grossier. 



Erycina. 



Tellina. London Clay : — shell figured by Brocchi. 



Teredo. In blocks of calcareous wood : the same as in the London clay. 



Teeth of shark. London clay. 



Scales of fishes. London clay. 



Pebbles of rolled black bone. 



Unknown radiating fossil resembling coral. 



This recognition of a stratum so nearly resembling the London clay in 

 respect of its peculiar shells and other fossils, in so distant a part of Asia, 

 receives still further interest when viewed in conjunction with the information 

 that has been afforded to us by Mr. Colebrooke*, as to the existence of a similar 

 formation at Cooch-Behar in the N.E. border of Bengal, where the Brahm- 

 putra emerges into the plain. Here Mr. Scott discovered strata of yellow and 

 green sand alternating with clay, that lie horizontally at the height of about 

 150 feet above the level of the sea, and contain organic remains resembling 

 those of the blue clay of the London and Hampshire basin. 



Mr. Scott has also discovered at Robagiri, in this same district, a stratum 

 of white limestone containing nummulites and vertebrae offish, surmounted 

 by beds of clay which contain the same nummulites, and also bones of fish, 

 with shells of Ostrea and Pecten. 



Near Silhet the Laour Hills, composed of white limestone loaded with 

 nummulites, form another example of tertiary formations in the eastern ex- 

 tremity of this province f . And the section near Madras, given by Mr. Ba- 

 bington j;, shows the same tertiary formations to exist also on the western shores 

 of the Bay of Bengal. 



All these circumstances taken together, leave not a doubt of the important 

 fact that the tertiary strata, which a few years since had been noticed only in 

 the basins of Paris and London, are most extensively distributed over the sur- 

 face of the globe. Their existence is now familiar to us in almost every state 



* Geol. Trans. 2nd Series, vol.i. p. 135; and Plate XXIV. 

 t See Map, Geol. Trans. 2nd Series, vol. i. PI. XXIV. 

 X Geol. Trans, vol. v. p. 337. 



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