PREFACE. 



The Survey Memoir upon the geology of the Salt-range 

 having been published, after long delay, almost simultane- 

 ously with the conclusion of the examination of the extension 

 of this range from the river Indus to the British frontier, 

 through the Bannu and Dera Ismail Khan hills, may enable 

 the present memoir with its accompanying map to appear so 

 soon after that relating to the cis-Indus portion of the range 

 as to form a supplement not greatly removed in the consecu- 

 tive order of the Survey publications. 



In view of the connexion between the Salt-range proper 

 and its prolongation, I have sought to keep the supplement- 

 ary character of the present memoir in view, and thus to 

 avoid unnecessary recapitulation as much as possible. 



It is to be regretted that I am unable to furnish fuller 

 observations upon the fossils of the district, regarding which 

 palseontological details may be expected when the fossils of 

 the whole Salt-range region have undergone examination, 

 already commenced and in competent hands. For any 

 specific determinations given in the following pages, I am 

 under obligation to Dr. Eeistmantel, Palaeontologist to the 

 Survey. 



Some of the views advanced upon the geology of the 

 Punjab in the Survey Manual lately published, and which 

 relate to this district, will be found less confidently stated 

 or differently regarded. So far as they admit of doubt, it is 

 well to have more opinions than one. 



A. B. WYNNE. 



MuRREE, ") 



May 1879. ) 



