OF KACHH AND KATTYWAE. 3 



Memoir on the Geology of Cutch, classed the Tertiary beds thus (Mem. Gaol. Surv. 

 Ind. vol. ix. p. 75, and MSS.) :— 



F. Upper Tertiary. 

 E. Argillaceous group. 

 D. Arenaceous group. 

 C. Nummulitic group. 

 B. Gypseous shales. 

 A. Subnummulitic. 



The lower four subdivisions, A, B, C, D, he considered Eocene, the group E Upper 

 Eocene or Miocene, F the Upper Tertiary, Miocene, or Pliocene. In the ' Manual of 

 the Geology of India,' p. 344, the only important modification was that the Argillaceous 

 group E was classed as Miocene, and equivalent to the Gaj group of Sind, the Arena- 

 ceous group being supposed, though with much doubt, to be the same as the Sind 

 Nari. 



In the collection of Cutch Echinoidea sent to England for examination the speci- 

 mens are labelled from two subdivisions, the " Nummulitic " and the " Arenaceous 

 group." There is clearly a mistake in the latter name, for the fossils are shown, by 

 their nature and localities, to be from the " Argillaceous group " of Mr. Wynne's 

 memoir and map. These beds are the Tertiary beds of Captain Grant, and are now 

 shown by the examination of the fossils to be of Miocene age. It will be well in 

 future to cease to employ these local terms of Arenaceous and Ai'gillaceous groups ; 

 like other mineral terms they are liable to mislead, and in this case they have been 

 confounded. It is clear that the Miocene beds of Cutch are allied to the Miocene 

 or Gaj of Sind, some of the fossils, as Breynia carinata (the most characteristic 

 Gaj species) and Coelopleurus Forbesi, being identical. Whether there is any difference 

 will probably be better decided after the Echinoidea from the Gaj series are examined. 



It appears also that representatives of the Nari or Oligocene limestone occur in 

 Cutch, where they have not been distinguished on the map from the Eocene Num- 

 mulitics (in Sind the separation was entirely due to an examination of the species of 

 Foraminifera occurring). The Arenaceous group of Mr. Wynne's memoir and of the 

 manual, but not of the present monograph, corresponds, both in position and mineral 

 character, with the sandy Upper Nari group of Sind — a somewhat important subdivision, 

 as it has now been traced northward up the Suleman range of the Western Punjab. 



The Kattywar Echinoidea are all Miocene ; but it is possible that a thin repre- 

 sentative of the Eocene system occurs in Kattywar, as it certainly does in Eastern 

 Guzerat near Surat. Kattywar is now undergoing examination by Mr. Fedden, whose 

 description has not yet been published. 



b2 



