134 SCIENCE PROGRESS. 



it appears that the Ceratite beds probably include repre- 

 sentatives of the Bunter, Muschelkalk and Keuper. Cephalo- 

 pods are very abundant in the Bunter (where in Europe 

 they are very rare) ; but are much less common in the 

 upper beds. It is remarkable that, whereas ammonoids 

 with true ammonitic sutures occur in the Productus Lime- 

 stone, all the ammonoids from these Ceratite beds show 

 ceratitic, or rarely goniatitic, sutures. In the Himalayan 

 Trias, on the other hand, ammonoids with ammonitic 

 sutures are common in the Trias. 



In the Central Himalayas x the unconformity which is 

 found in the Salt Range between the Lower and Upper 

 Palaeozoics is absent; and both Devonian and Carboniferous 

 rocks have been described. But their fossils are yet un- 

 examined. 



The Carboniferous is overlaid— it is believed uncon- 

 formably — by beds which are regarded as Permian and 

 Trias ; and ol these the Trias has yielded an important 

 series of fossils, which is now undergoing examination. 

 The whole of the Triassic sequence appears to be present, 2 

 and the lower part, as in the Salt Range, is characterised 

 by a great abundance of cephalopods. The higher beds 

 show gradually increasing European affinities, until in the 

 Rhaetic portion of the series the deposits are said to be 

 almost indistinguishable, both lithologically and palaeonto- 

 logically, from those of the Alps. 



Finally before leaving the Upper Palaeozoic and Lower 

 Mesozoic rocks (which in India are naturally grouped to- 

 gether) it may be noted that Carboniferous fossils occur in 

 Tenasserim, and have recently been described by Noetling. 3 



The Cretaceous rocks of India are not very extensive, 

 but they are of great importance, for it is on them that 



1 Griesbach. '• Geology of the Central Himalayas." Mem. Geol. Surv. 

 India, xxiii. (1891). 



2 See a note by Mojsisorics, Sitz. d. It. Akad. IViss., Vienna, Math. Nat. 



Class, ci. (1892), translated in Rec. Geol. Surv. India, xw. (1892), p. 186 



3 Rec. Geol. Surv. India, xxvi. (1893), p. 96. 



