1859.] Proceedings of the Asiatic Society. 303 



Burmese and Indian Helicidae, with remarks on some previously 

 described species. 



6. From Baboo Kadahnautli Sikdar, an abstract of the Hourly 

 meteorological observations taken at the Surveyor General's Office in 

 the month of February last. 



The Officiating Librarian submitted the usual monthly report. 



Mr. J. G. Medlicott read a " Note on the Geological structure 

 of parts of Central India." 



Mr. Medlicott first pointed out, with the assistance of Maps, the 

 existence of some remarkable features in the physical aspect of a band 

 of country, which stretching in a generally E. and W. direction, across 

 Central India, includes the valley of the Nerbudda and that of the 

 Soane, from Mundlaisir on the former, to Rhotasgur on the latter. 

 These are, first, the persistently rectilinear direction of two ranges of 

 hills, one on the north of both these vallies, and the other on the south 

 of them, and next, the close approach to parallelism maintained by 

 these ranges throughout a length of between 500 and 600 miles. 



It was then shown that each of these parallel lines is a geologi- 

 cal boundary, and that each of these boundaries is a fault, lastly, 

 that the movements which caused these faults, occurred with an 

 interval of, at least, one whole geological period, between them. 



Briefly analysing a theory held by many geologists, and which 

 affirms the synchronous origin of parallel faults, and describing 

 some of the difficulties attending the satisfactory application to 

 facts, of this theory, Mr. Medlicott concluded by showing, how, and 

 to what extent, the example before the meeting must be considered 

 as furnishing an exception, and as being a case in which the theory 

 does not hold good. Believing that it was desirable to place on 

 record instances of this nature, he at the same time deprecated the 

 idea of hastily discrediting the theory with what may be only an 

 apparent failure, consequent perhaps on the neglect or erroneous 

 appreciation of some conditions having vitiated the result of other- 

 wise careful observations and cautious inductions. 



The thanks of the meeting were voted to Mr. Medlicott for his 

 able paper. 



