NOTE TO PART I. 



The use of the terms " lower" and " upper" in connexion with 

 the Jurassic or tertiary series in the foregoing part of this memoir, 

 must be clearly understood in the sense in which they were applied in 

 the field — merely as meaning lower and upper (physically) groups of 

 Kutch, leaving for the present undetermined their more or less com- 

 plete correspondence with the jm-assic and tertiary formations of other 

 places. 



The laborious examination of a large paleeontological collection, 

 such as that obtained from the province, would necessarily occupy a 

 much longer period than it was considered advisable to delay the 

 publication of the field work. This examination is now only so far 

 advanced as to enable some general conclusions to be arrived at, pointing 

 to the probability that the oldest or lowest of the Jurassic rocks of this 

 district will be found to correspond to the Bath oolite of England, and, 

 therefore, to occupy a geological position superior to any of the ' lower 

 Jurassic' rocks of European series. Of the middle and upper portions of 

 this series several sub-divisions are partially represented here, the cor- 

 respondence being so far perfect that the uppermost beds of the marine 

 Jurassic group, called in this paper 'lower Jurassic' of Kutch, contain 

 fossils which are truly of upper (European) Jurassic age. 



Above these comes the mass of the plant-bearing beds of the dis- 

 trict, here called ' upper Jurassic,' united to the underlying marine fossil- 

 bearing rocks both by transitional beds, and by at least one undoubted 

 case of intercalation of a Pafeo^aOTM-bearing zone with others contain- 

 ing marine Jurassic fossils. It is, therefore, clear that both of these 

 n ( 95 ) 



