INTRODUCTORY. 11 



20. Cyelolina peduncalata, Carter. An Orbitolites, as subsequently recognized by Dr. 

 Carter, and distinct from O. complanata, Lam. included by D'Arcbiac and 

 Haime witb doubt in tbe Sind fauna. 



Dr. Carter's most widely known contribution to the history of Sind 

 geology is, however, that contained in his " Summary of the Geology of 

 India, between the Ganges, Indus, and Cape Comorin," originally pub- 

 lished in 1854/ and reprinted with additional notes in 1857. 2 Western 

 Sind is of course outside of the area as denned, but still the rocks are 

 repeatedly mentioned, and all the information then existing about them 

 is quoted. The information was not extensive, and in fact was little more 

 than that supplied by Vicary. The occurrence of nummulitic limestone 

 at Hyderabad, Rohri, Dajikote (Kot Deji), Sukkur, near Karachi, and in 

 the Hala range, is noticed, and Vicary's section quoted ; " lower blue 

 clay," referred to miocene in the original paper, but subsequently, in 

 deference to D'Archiae and Haime's views, classed as eocene, is said to be 

 found at Karachi, a section at Ghizri being quoted ; and Vicary 's bone- 

 beds and gravels are classed with the ossiferous conglomerates of Perim 

 Island, the Nerbudda, the Godavari, and the Jumna, and placed with the 

 blue clay in the first edition, but removed from it and considered apparently 

 as pliocene in the second. The rocks described at Minora by Vicary are 

 called pliocene, and it is suggested that the hills at Jhirak ( Jerruck) , 

 which rest on blue clay, may be of the same formation (they are really 

 lower eocene or Ranikot). Some post-pliocene sands, conglomerates, and 

 clays at Karachi are also noticed. It is unnecessary to do more than refer 

 to a few remarks on the " evidence of volcanic disturbance and effusion sub- 

 sequent to the deposits of the eocene and miocene and pliocene formations," 

 since the whole argument is vitiated by the incorrect idea, derived from 

 Grant, that the traps of Cutch are, in great part at least, of later age than 

 pliocene. Of the physical geology of the country scarcely anything 

 accurate was known at the time Dr. Carter wrote ; his compilation was, 

 however, invaluable as a record of the imperfect knowledge existing. 



1 Jour. B. Br. Roy. As. Soc, v, pp. 179—334. 



2 Geological Papers on Western India, pp. 628 — ?76. 



( n ) 



