190 PROCEEDINGS OF THE GEOLOGICAL SOCIETY. 



existence of true palseozoic rocks * in Hindostan proper to the South 

 of the Himalaya mountains ; and, in doing so, indicates, that great 

 masses of the Salt of the Punjaub occur in deposits of the age of 

 our Old Red Sandstone (Devonian). 



In his first letter, dated from the Murree Hill, 29th May, 1851, 

 the author mistrusted the evidence on this last point, although it was 

 clearly placed before him ; being then unaware that salt masses occurred 

 in any formations of higher antiquity than the ' New Red ' or ' Trias.' 

 In reply I explained to him, that in this respect the salt of the Pun- 

 jaub occupied precisely the same position as the Russian salt of 

 Livonia, and that in other countries that mineral was found associated 

 with formations of nearly every age from the oldest to the youngest. 

 [The second letter is in reply to my explanation.] 



With regard to the palaeozoic limestone described in Dr. A. 

 Fleming's Letters (the No. 5 of his section), I have to remind the 

 Society that a series of its fossils were sent home to his father the 

 Rev. Dr. Fleming in 1848, and exhibited at the Meeting of the 

 British Association at Edinburgh. The following species were sub- 

 sequently identified by M. de Verneuil and Mr. Davidson : — 



Productus Cora, D'Orb, a species known in Peru and Spitz- 

 bergen, as well as veiy generally on the continent of Europe, 

 even southwards to the Sierra Morena, where it was detected 

 by M. de Verneuil. 



Productus costatus, Sow. 1 



Productus Flemingii, Sow. > Well-known Carboniferous forms. 



Orthis crenistria? Phill. J 



Terebratula Royssii, L'EveilU, of America and Belgium. 



Terebratula crispata? Sow. 



And several new species of Terebratula, &c. 



In an introductory notice to Major Vicary's paper on the Geology 

 of the Upper Punjaub, read before the Society in December 18.50t, 

 I briefly referred to Dr. A. Fleming's discovery of these fossils, in 

 connection with the researches by Dr. Falconer and Major Vicary on 

 the palaeozoic rocks of Northern India. 



The second letter of the author, dated 16th January, 1852, from 

 Kutta, in the Salt Range, sustains the chief views pointed out in the 

 first letter with some explanations. The principal feature of interest 

 which is added is the expression of the author's belief, drawn from 

 physical phsenomena, that the chief saliferous masses have been pro- 

 duced by eruptive agencies. This opinion must be the more entitled 

 to our consideration, as it is manifestly the result of observation in the 

 field, and not derived from a desire to follow the theories of any 

 author ; Dr. A. Fleming being unaware (removed as he is from all 



* A letter to me from Professor Oldham announces that the supposed Old Red 

 Sandstone and Carboniferous rocks of Chirra Poonjee to the N.E.,of Calcutta, de- 

 scribed as such by Dr. M'Clelland, have proved to be older Tertiary and nummulitic 

 strata ; all the coal of the region between Assam and the Plains of Sylhet being 

 subordinate to them. 



t See Quart. Journ. Geol. Soc. vol. vii. p. 39. 



