CEPnALOPOP 
nORT/ONS 
HIMALAYAN TUIAR. 
141 
The following table shows the distribution of cephalopod horizons in 
Spiti (sections near Lilang), Painkhanda (Bambanag and Shalshal cliffs), 
Byans and Malla Johar. It is from a combination of our experiences 
in those four areas, that we shall arrive at establishing a general 
standard of cephalopod-bearing horizons in the Central Himalayas. 
It must, however, be remarked, that among those fifteen Triassic 
cephalopod horizons the existence of three is rather doubtful. No. 5 
perhaps does not correspond to an independent palaeontological zone, 
as defined by a peculiar fauna of ammonites, although Rhynchonella 
Griesbachi is restricted to this horizon. From No. 9 only a single 
ammonite, Jommites fhanamensis Dien., is known. No. 15 has 
been based on two fragmentary specimens of ammonites, collected 
from the Monotis beds in Spiti and from the main layer of Anodonto- 
phora Griesbachi in Painkhanda. In neither case have I been able to 
determine the species. 
Noric sta.ge 
Carnic stag'e 
Spiti. 
15. Horizon of Trachy- 
pleuraspidites 
aff. Qriffithi. 
Painkhanda. 
15. Horizon of 8age- 
nites sp. ind. 
14. Horizon of Juva- 14. Horizon of Halo- 
vitesf angulatuf. rites procyott. 
13. Horizon of Pro- 
clydonautilus Gries- 
bachi. 
12. Horizon of Tropiies 
suhhullatus. 
10. Horizon of Joan- 
tiHes cymhiformis; 
9. Horizon of Joan- 
nifes thanamensis. 
12. Horizon of Moj- 
svarites eiigyi-us. 
11. Horizon of Juva- 
rites tonkinensis and 
Hypocl a di sci te s 
suharatus. 
10. Horizon of Jonn- 
iiites cymbiformis. 
Byans. 
14. -1 
13. 
12. J 
Horizon 
of Tro- 
pites 
suUjuI- 
latus 
and 
Halor- 
ites sp. 
aff. pro- 
cyan. 
Exotic blocks 
of Cliitichun 
and Malla 
Joliar. 
12. 
11. 
^ Horizon 
I of Cla- 
> discites 
1 crasse 
J striatus. 
( 342 ) 
