CORRELATION OF THE LOWER TRIAS. 35 
equivalents of the Otoceras beds in the unfossiliferous shales and 
sandstones, which in the sections of Chideru and Virgal separate the 
Chideru group of the Upper Productus Limestone from the Ceratite 
formation. Noetling correlates them with his zone of Euphemus indicus 
of the Upper Productus Limestone, but this correlation is not based on 
palaeontological evidence, not one single identical species having been 
found in the two horizons. 
The special development, which the Lower Triassic faunae have taken 
in those two regions, renders it evident that a correlation of the minor 
subdivisions cannot be made except in a most general way, and always 
with the mental reservation that their lower and upper boundaries do 
not strictly coincide. 
When the examination of the fossils collected in the Ceratite beds 
by Noetling and Koken is finished, it may be possible to form a 
better scheme of classification, in which the relative positions of 
the Lower Triassic strata in the two regions may be determined more 
exactly. For the present the following tabular statement will show the 
conclusions reached, as indicated above, by those best quahfied to 
determine the relations of the lower Himalayan Trias with the Ceratite 
formation of the Salt Ranj 
?e :— 
Himalayas 
Salt Range 
Noetling, 1905, 
Diener, 1908, 
Zone of Sibirites spiniger 
(Byans). 
Upper Ceratite limestone. 
Upper Ceratite lime- 
stone. 
Hedenstroemia beds (zone of 
Ceratite sandstones. 
Ceratite sandstones. 
Flemingites Rohilla). 
Ceratite marl. 
Ceratite marl. 
Meekoceras beds (zone of 
Meekoceras Marhhami). 
Lower Ceratite limestone. 
Lower Ceratite lime- 
stone. 
Otoceras beds (zone of 
Otoceras Woodwardi). 
Zone of Euphemus indicus 
(Upper Productus lime- 
stone). 
Unfossiliferous clay and 
shales. 
Kuling (Productus) shales. 
Upper Productus Lime- 
stone. 
( 236 ) 
