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DIENEK : TKlAS OF THE HIMALAYAS. 
5. Tropites limestone. 
4. Light grey limestone (Muscliolkalk, ladinic (?) and carnic stage). 
3. Chocolate limestone (Lower Trias). 
2. Prodiictus (Ruling) sliales (Permian). 
L Brown quartzite. 
la. White quartzite. 
A. V. Krafft discovered several fragments of ammonites in the top- 
most beds of the grey limestone (No. 2) and in the overlying shales 
(No. 3). Their similarity with forms from the zone of Pwclydonautilus 
Griesbachi and from the Halorites limestone of the Bambanag section 
induced him to venture on a correlation of the shales No. 3 with the 
Halorites beds of Painkhanda. But the specimens in A. v. Krafft's 
collections are all indeterminable fragments, which do not even permit 
of generic identification. Moreover, the correlation with the Halorites 
limestone is contradicted by the zoological character of the Tropites lime- 
stone. For the present moment we are not able to say anything definite 
about the probable correlation of the Upper Triassic beds of Byans 
following above the Tropites limestone. 
The only fossiliferous horizon of Upper Triassic age in Byans which 
is distinguished by a rich and characteristic fauna is the Tropites lime- 
3tone. Among the fossils discovered by C. L. Griesbach near Kalapani, 
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