OF CENTRAL INDIA AND BENGAL. 213 



believe we still want very much more satisfactory fossil data before 

 we would definitely refer the rocks which have been called Upper 

 Damuda to any fixed parallel in the rocks of Bengal.* 



The age of the Mahadeva group, referred to by Mr. Blanford, I 

 would abstain from discussing at present, as I feel convinced that there 

 are as yet no sufficient data on which to base any satisfactory conclu- 

 sion. 



Calcutta, June 1861. 



* la speaking of the fossils of these rocks in Volume II. of these Memoirs, I mentioned 

 (p. 324,) a number of what seemed to be the " detached scales or bracts of the cones of 

 cycadeous plants." Shortly after writing that, some better specimens were procured, which 

 led me to think them rather coniferous than cycadeous. 



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