142 
DIENER : TRIAS OF THE HIMALAYAS. 
Spiti. 
Painklianda. 
1 
Byans. 
Exoric blocks 
of Cliitichun 
and Malla 
Johar. 
Ladinic stage 
8. Horizon of Protra- 
chyceras Archelaus- 
Muscliclkalk 
7. Horizon of Cera- 
tites Thuillieri and 
Ptychites rugifer. 
6. Horizon of Keyser- 
lingites Dieneri 
7. Horizon of Cei-a- 
tites Thuillieri and 
Ptijchileg rugifer. 
6. Horizon of Keyser- 
l ingiies Dieneri. 
5. Horizon of Sihiriies 
Prahlada. 
7. Horizon of 
Cera t i t e s 
Thuillieri. 
6. Horizon ol 
MonophyU 
lites Confu- 
cii. 
Lower Trias . 
3. Horizon of Beden- 
strosinia Moj sisovicsi 
and Flemingites 
RoJiilla. 
2. Horizon of Meeko- 
ceras Varaha. 
1. Horizon of Otoceras 
Woodwardi, 
3. Horizon of Heden- 
stroeinia Mojitisovicsi 
and Plem. Rohilla. 
2. Horizon of Meeho- 
ceras MarTchami. 
1. Horizon of Oto- 
ceras Woodwardi. 
4. Horizon of 
8ih i r it e s 
spiniger. 
3. Horizon of 
HedenstrcS' 
mia Moj- 
sisovicsi. 
3. Horizon of 
Meelioceras 
john reuse. 
Permian 
Horizon of Cyclolohus 
insignis. 
Four cephalopod horizons are known to us from the Lower Trias, 
two or perhaps even three from the Muschelkalk, one from the ladinic, 
three (or four ?) from the carnic, two (or three ?) from the noric stage. 
In comparing the number of cephalopod horizons with the thickness of 
the corresponding rock-groups, it is evident at once that the Himalayan 
Lower Trias and Muschelkalk deserve indeed the name of cephalopod 
facies, whereas this is not the case in the Upper Trias. In the carnic 
and noric beds of Spiti we may pass through many hundred feet of 
shales and limestones, without meeting with a single cephalopod- 
bearing layer. 
( 343 ) 
