“15——
absent in the Nathors tites aes of northeastern peiren Columbia. The
Trachyceras, if valid, would decisively estavlish an early Karnian age;

it may be, however, a Dowsonites. The TIS may Woilent the evidence 4

-little in favour of an early Karnian are,

_Kotelny Island \-
Nathorstites has been recorded :from Kotelny Island, one.of the New
Siberian Tedenae in the Arctic Sea north of Siberia: No other fossils
have been found with it, so that no comparison can be made with Alpine -

and Himalayan faunas.

onclusions

The oreliminary study of the Nathorstites fauna has not reached a final
aad decisive verdict in the case of a Ladinian versus a Karnian age of the
fauna, The evidence from a study of the fauna in northeastern British Columbia
weights the case consideradly in favour of a late Ladinian age, ‘whereas that
cvom the Bear ie Tavares fauna seems. to favour, slishtly, a Karnian aze, but is
pace Gs upon, less Sete el ia Este Oke than that from British Columbia.

| the sells of an age intermediate between Ladinian Protrachyceras

Le ela and Karnian Trachyceras time is not yet eliminated. :

NOTES ON FOSSILS
It is not intended Anehese preliminary rovorts on the Triassic of
northeastern British Columbia, published in ‘the Paper series. of the Geological
Survey, to attempt any detailed sacoeNicayE of the palacoatolory, ineeradl on an
exhaustive study of the literature; ee At ieenaed to attemvt any extended

generic revision, although this is doubtless required in some ammonoid

fumilies. It is vroposed, however, vie) ellansets. in a general way, the relations

and status of some BRIERE and species sroups, in order to ELI ahete the place
of the Canadian species in the general scheme ‘of slasaifiention,

Comparison of Ganadien with foreign speehiece and the orief conments on
the evolutionary history of foreign aovainicye are based on {iustrotiona and
desorivt ‘ions in foreten publications and not on the examination of actual

foreign specimens; it is Coe that some illustrations, Beer oceciy those