64 W. BLANFORD, WESTETIN INDIA. [PaRT I, 



Ruttunpoor sections,^ nor were the shells, shark's teeth, and ialani of the 

 upper beds of Surat and Broach found at Perim. 



There is, however, a great change, both in fossils and in mineral 



character, between the upper and lower beds be- 

 A difference in age be- . . 



tween upper and lower tween Broach and Surat. Until the fossils are more 

 beds probable. • i i i i • i 



carefully examined than has hitherto been practi- 

 cable, it is difficult to say if any species occur in both, but the majority, 

 and especially the characteristic fossils, are distinct. The Nummulites, 

 Orhitolites and other Poraminifera, the Pectens, Ostrea Flemingi, Vulsella 

 legumen, Cones and Corals of the nummulitic limestone, were not met 

 with above, but in their place distinct kinds of oysters, Pholadidea 

 (Martesia y tortoise plates, shark's teeth, foraminifera as Rotalia and 

 Operculina, apparently all distinct from those below, Bryozoa, and, in 

 great abundance valves of Balanus, are met with. The differences in 

 mineral character have already been indicated. 



If the two groups are distinct, and the evidence is certainly rather 



in favor of their being so, it appears probable 



Probability of higher % ■, ^ • -, 



group overlapping the that the higher overlaps the lower about half way 

 lower* 



between the Keem and the Nerbudda, as no bed 



distinctly referable to the lower group is met with north of Wagulkhore. 



It should, however, be remembered that the sections met with were 



„ ,. - but few and very imperfect, that the rocks onlv 



Imperfection of sec- j s: ' j. 



tions. appeared above the surface of the ground in rare 



instances, and that by far the greater portion of the country was covered 

 and concealed by thick alluvial deposits, even within the small area over 

 which rocks have been marked on the map ; and it appears therefore 

 wisest, until the whole question has been worked out in the great num- 

 mulitic tracts further west, to abstain from attempting to separate the 



* If, however, the occurrence, mentioned ante p. 19, of a jaw of Mastodon having been 

 procured near Broach by Malcolmson be correct, there can be little doubt but that the Perim 

 beds are represented in that country. Still it is not clear what portion of the series they form. 



( 226 ) 



