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HALLE has compared his two species of Sciadopitytes with Scia-
dopitys verticillata, but he does not consider it quite certain that
the fossil forms are closely related to the recent genus.
Concerning the genus Sciadopitytes of HALLE SEWARD says in his
book “Fossil Plants“ (Vol. IV): “These two species, though exhibit-
ing some similarity to Sciadopitys, can hardly be assumed to be-
long to plants more closely allied to the recent Japanese Conifer
than to other existing forms“. GOTHAN (1921), however, seems to
consider a nearer relation to Sciadopitys to be very probable.
JOHANSSON (1920) has described two new mesozoic species of
Sciadopitytes found on Andö in northern Norway.
Finally, the species of MENZEL, Sciadopitys tertiaria, was recently
discovered also in the upper pliocene flora of Klärbecken (Frank-
fort) and in the upper miocene flora of Kokoschiitz in Silesia
(FLorin 1922). —
That Sciadopitys is an old type of conifers I consider highly
probable. The recent geographic distribution of the genus points
in that direction. Sciadopitys verticillata is endemic to Japan.
It occurs in the highlands of Hondo and is confined to the zone
of Cryptomeria and Cupressineae (PATscHKE). Hoping to get an
opportunity to throw some light on the geological history of Scia-
dopitys I have searched systematically through several paleobota-
nical collections of Europe. Most of my material belongs to the
paleobotanical department of the State Museum of Natural History
at Stockholm, the curator of which, Prof. Dr. T. G. HALLE, has
shown the greatest interest in my investigations and promoted
them in the most liberal manner. Further I am gratefully indebt-
ed to Prof. Dr. W. Goran in the paleobotanical department of
the Geological Survey of Prussia in Berlin as well as to Dr. R.-
KnávsEL in the Senckenberg Museum, Frankfort (Germany), for
very valuable material of a tertiary species of Sciadopitys.
My notes on the geological history of the Sciadopitineae in the
present paper ought to be regarded as preliminary. I hope to get
an opportunity to complete my material in the near future. In
this connection I shall only give some short notes on the species
hitherto recognized.
The diagnosis of HALLE for the genus Sciadopitytes I propose to
modify in the following way:
Linear "leaves" of Conifer-like habit, with a
median furrow or groove whose epidermal tis-
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