S3T.4 



MEMOIRS 



OF THE 



GEOLOGICAL SURVEY OF INDIA. 



Vol. XXXI, 



Published by order of His Excellency the Governor General of India 



in Council. 



\C[(jAS\ 



CALCUTTA : 



SOLD AT THE OFFICE OF THE GEOLOGICAL SURVEY. 

 LONDON; MESSRS. KEGAN PAUL, TRENCH, TRObNER & Co. 



MDCCCCI 



