166 SUB-HIMALAYAN ROCKS OF N. W. INDIA. [CHAP. VI. 



described as the Krol group. Other cases occur in the inner regions. 

 Vigne, in his " Travels in Kashmir," 1842, Vol. I., 

 page 276, mentions the occurrence, on the eastern 

 side of Manasu Bui lake, in the Kashmir valley, of a limestone, full of 

 nummulites. In a letter lately received from Mr. Drew, who is engaged 

 in a geological investigation of these interesting regions, he tells me 

 that he could not find the nummulites or any other fossil in or about 

 the locality ; he says, " I fully believe Vigne was misled by an appear- 

 ance, certainly very like nummulites, on the weathered surface of the 

 limestone, where it is made crystalline by being near trap." There 

 is another statement of the occurrence of these nummulitic rocks, which 

 I cannot presume to call in question. Dr. Thom- 

 son, in his " Western Himalaya and Tibet," 1852, 

 p. 881, describing the Singhi La pass,— a locality a short way south 

 of the Indus, in the central mountains of Thibet, in about the 

 same longitude as Mundi, and the same latitude as Srinagar in Kash- 

 mir, at an elevation of over 16,000 feet> — says : — " Quartz rock, slate, 

 and limestone alternated during the ascent ; and near the summit of 

 the pass the limestone evidently contained organic remains, perhaps 

 coralline, though their traces were not sufficiently distinct to enable 

 me to decide the point." This, however,, has been done : M. d'Archiac 

 describes these fossils (Groupe Nummulitique de l'lnde, p. 176) as 

 Alveolina Melo, and, doubtfully, Nummulites Raymondi. The con- 

 jecture again presents itself that these rocks may be the same as the 

 Krol group, described in Chapter II. 



In Vol. II., p. 156 of his " Himalayan Journals," Dr. Hooker records 

 a geological observation made at about the most 

 northerly limit of his travels, within the frontier 

 of Thibet, on the northern flanks of Kinchinjow ; at this place con- 

 glomerates, slates, and earthy red clays overlie the gneiss, all having a 

 north-east dip ; further on a dark limestone occurs, " full of encrinitic 



