MEMOIRS 



GEOLOGICAL SURVEY 



OF 



INDIA. 



VOL. XI, Pt. 2. 



PUBLISHED BT ORDER OF HIS EXCELLENCY THE GOVERNOR GENERAL OF INDIA 



IN COUNCIL, 

 TNDEB THE DIEECTION" OF 



THOMAS OLDHAM, LL.D., 



Fellow of the Royal and Geological Societies of London; Memher of the Royal Irish Academy s 



Hon. Mem. of the Leop-Carol. Academy of Natural Sciences; of the Isis, Dresden ; 



of the Roy, Geol. Soc. of Cornwall; of the Soc. Imp. de Natur. 



Moskow; Corr. Mem. of Zool. Soc, Lond., £e., $c. 



SUPBEINTENDENT OF THE GEOLOGICAL SUBVEY OF INDIA. 



CALCUTTA: 



PRINTED FOE THE GOVERNMENT OF INDIA. 



SOLD AT THE 



GEOLOGICAL SURVEY OFFICE, 



OFFICE OF SUPERINTENDENT OF GOVERNMENT PRINTING 



AND BY ALL BOOKSELLERS 



LONDON: TRUBNER & CO. 



MDCCCIIXT. 



