CRETACEOUS SERIES. 31 



that forming the plateau. There are no means of fixing the extent of 

 this overlap of the cretaceous beds here, as there is no higher ground to 

 the north ; but all the outcrops in that direction are of crystalline rocks. 



In the extreme east, on the KopLli and the Namba, the general 

 conditions are like those at Singmari — the cretaceous beds rest upon the 

 older gneiss at a low level. On the Namba (near Grolaghat) the supposed 

 cretaceous rocks are limestone and calcareous sandstone. On the Kopili 

 at Panimao the rocks resting on the gneiss are fine pure sandstones, slightly- 

 undulating, though scarcely more than might be due to their position on 

 an uneven surface of the crystallines. A good deal of hydrometamorphism 

 has taken place near the surface of contact, the sandstone becoming a 

 quartzite. It may be doubted if these beds are cretaceous. The friable, 

 rusty, fossiliferous sandstone, of quite the same character as the Cherra 

 rocks, and that has been recognized as cretaceous, appears at a short 

 distance to the south of Panimao. 



Dr. Stoliczka has furnished me with the following note upon the 

 fossils from these cretaceous rocks : — 



" The highest fossiliferous band, about 300 feet below the edge of 

 cliff at Maosmai — a coarse sandy limestone with small fragments of 

 pale pinkish compact limestone contains some little Peleeypoda, a 

 Cellepora, and species of Echinoderms. A finer grained variety of the 

 rock is principally made up of an Astrocania allied to A. decaphylla, 

 M. Edw., from the Turon beds. 



" From about the middle of the series, above Mahadeo in the bed of 

 a stream under Laisophlang, in a soft, ochreous glauconitic sandstone : 

 a small Nautilus, probably iV. elegans ; fragments of a Nautilus with a 

 central siphon; Ammonites planulatus, Sow.; Am. disp ar, di'Oxh.; Am. 

 Orligyanus, Geinitz ; fragments closely allied to Am. pacificus, StoL, from 

 S. India; Anicoceras indicum, Forbes; Anis. sui-compressum, Forbes; 

 a BacuUtes, compressed laterally more than B. vagina ; Alaria papilio- 

 nacea, Goldf. ; Eostellaria (Calyptropliorns?) palliata, Forbes; Gosavia 



( 1«1 ) 



