88 WYNNE : TRANS-INDUS EXTENSION OF THE PUNJAB SALT RANGE. 



Beachiopoda. 



Terebratula biplicata, Sow. (Verchere names several other species). 

 Terebratula sella, Sow. 

 Terebratula. — several other species. 

 jRhgnc7ionella comp. dimidiata, Sow. 

 Rhynchonella — several other species. 



COBALS. 

 Fungia, sp. 



Plants. 

 Ptilophyllum acutifolium, Morr. 

 JPodozamites, sp. 



But little remains to be said of the tertiary rocks of this neighbour- 

 hood. The whole series possesses an almost mono- 

 Siwalik beds. 



tonous sameness of character with an endless diver- 

 sity of form. The dips uniformly correspond to the ovoid dome-shaped 

 mass of the older rocks, and the bedding lines in these thick, soft, homo- 

 geneous sandstones are frequently so subordinate that the deep erosion 

 which produced the many ramifying spurs, disregarding the bedding, has 

 tended to produce vertical surfaces, whether the stratification be itself 

 vertical or inclined. So readily has the mass yielded to the wasting agencies 

 that one can penetrate with scarcely perceptible ascent, until close to the 

 backbone of the hills, by following any of the numerous flat-bottomed 

 dry sandy gorges. Further to the eastward it becomes apparent that the 

 stratification has, notwithstanding, exerted a modifying influence upon the 

 large scale, for this backbone of the Nila Roh does not coincide closely 

 with the anticlinal axis of the range, but lies adjacent to this axis at a little 

 distance to the north, leaving the steep inclinations of the rocks to the 

 south, and tending to form a scarp along the outcrop of the more gently 

 sloping strata in the opposite direction. From the space occupied, the 

 height of the range, and the angles of inclination, it is estimated that the 

 Siwalik beds of the Nila Roh are more than 4,700 feet thick, the upper- 

 most 500 to 700 feet being chiefly clay. 



Siwalik fossils have long been known to occur in these beds, but all 



that were readily procurable seem to have been 

 Fossils. . . 



already collected by visitors to Shekh Budin, Dr. 



( 298 ) 



