* 
MEMOIRS 
OF 
THE GEOLOGICAL SURVEY OF INDIA. 
The Trias of the Himalayas, C. Diener, Ph.D., 
Professor of Pakwiitology at the University of Vienna. 
♦ 
I —INTRODUCTION. 
In a note accompanying the description of the Muschelkalk in Spiti 
in the first part of the present volume by H. Hayden (page 72), and in a 
chapter treating with the correlation of the Mesozoic beds of Spiti with 
those of other parts of India and of Europe (page 88) it was proposed to 
devote a second part of this volume to a summary of the Trias of the 
Himalayas. 
A paper treating with this subject, which had been left by the late 
Dr. A. v. Krafft in 1901, was entrusted to me for a careful revision by 
C. L. Griesbach, then Director of the Geological Survey of India. But 
the fragmentary character of the paper, consisting only of scattered 
and unarranged notes, induced me to postpoi\e this task, until the 
palseontological descriptions of the new materials from the Triassic rocks 
of the Himalayas had been finished. The advisability of basing a sum- 
mary of the Trias of the Himalaya on the results of an examination of 
the entire stratigraphical and fossil materials then available, was 
obvious. 
This examination being now finished and the geological explo- 
ration of the Central Himalayas having come to a close for several 
seasons, a detailed paper on this subject is justified. This paper, 
however, can hardly be called a revision of A. v. Krafit's original notes> 
but is almost entirely my own work. 
P ( 202 ) 
