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PROCEEDINGS OF THE GEOLOGICAL SOCIETY. 



[Mar. 20, 



ledge, we should not know where to look for its analogue in rocks 

 older than the Lower Jura or Upper Trias. 



In the same limestone as contains these Entomostraca at Kota, we 

 are presented with an interesting assortment of Insect exuviae, in- 

 cluding the wing-covers of Blattidm and the elytra of Beetles, which 

 forcibly remind me of the researches of the Kev. P. B. Brodie in the 

 Lower Jura of England. The Fishes of this limestone and its asso- 

 ciated bituminous shale have been pronounced by Sir P. G. Egerton 

 to belong to a " true Oolitic form, and apparently of the date of the 

 Lias*". Finally, an imperfect bivalve found in the shale withiepi- 

 dotus Deccanensis exhibits an appearance of corrugation at the umbo 

 such as characterizes the genus Unio, a Mollusk of comparatively 

 recent introduction on the stage of existence. 



Combining these results, it would appear that of the rocks which we 

 have been comparing, while one fossil (viz. the Brachyops of Man- 

 gali) points to the highest member of the Trias, and while the abun- 

 dance of Estherice associated with it would indicate either that or 

 a Lower Jurassic age, the latter organism is found at Kota, with 

 Fishes, Insects, Cypris, and Unio (?), which are all in favour of an 

 epoch not lower than the Lias. Arid to this same side of the balance 

 must be added the evidence of Glossopteris, Tamiopteris, a species of 

 Pecopteris, the furcate-veined tripinnate frond, the Cycadaeece, the 

 Phyllotheece, disk-bearing Equisetites, the stems with obliquely striated 

 bark, and some of our seeds or seed-vessels. It may be that these 

 Indian strata constitute a sort of passage between the Lias and Trias, 

 as has been suggested by Mr. Jones in a valuable note on Esiheriaf; 

 and certainly the Ceratodi of MalecZi cannot fail to call to mind the 

 Bone-bed of Aust ; but, upon the whole, I am still of opinion that 

 the weight of testimony lies on the side of the Lower Jura, as I en- 

 deavoured to prove in a paper submitted to the Bombay branch of 

 the Royal Asiatic Society in March 1853. And, on this view of 

 the age of the contemporaneous fossiliferous strata of Western 

 Bengal, rsagpur, Mangali, and Kota, if we may assume the red clay 

 at MaleJi to be the same as the red clay in Dr. Bell's section, about 

 70 feet below the lowest of the ichthyolitic beds on the banks of the 

 Pranhita, we may understand how appropriately the Ceratodus teeth 

 of the one locality are found beneath the Lepidotus, Insects, Ento- 

 mostraca, Unio (?), and reticulated fronds of the other. 



3. On the Relative Positions of certain Plants in the Coal-bearing 

 Beds of Australia. 



By the Eev. W. B. Clarke, M.A., F.G.S. 



In the " Observations on the Flora of the Oolite," by Baron de 

 Zigno, published in the Quarterly Journal of the Society, No. 62, 



* Quart. Joiirn. Geol. Soc., vol. vii. p. 272; vol. ix. p. 351. 

 t Quart. Journ. Greol. Soc, vol. xii. p. 376. 



