98 
T. G. HALLE, 
(Schwed. Südpolar-Exp. 
pteris. One of the species described under this genus, 5. furcata, has a structure 
of the frond very different from that of all previously known species. Pachypteris 
and Thinnfeldia are other genera which are represented by numerous specimens. 
Of other more important form-genera of ferns, it is to be noted that Tæniopteris is 
altogether absent. Sagenoptcris^ which has been compared with the Hydropterideæ^ 
is represented by a typical species. 
Among the Sperinophyta both the Cycadophyta and the Coniferæ are well repre- 
sented, whereas there is no trace of the Ginkgoales in the collection. This latter fact 
may be purely accidental, but is worthy of note for the comparison with other floras. 
Some important and elsewhere common Mesozoic genera of other groups are absent, 
too — for instance, Podozamites^ Anoinozamites and true Pterophylla. Some genera of 
the Cycadophyta occur in rich development, especially Zainites and Otozamites. Both 
these genera are characterized by the abundance of small forms, whereas large fronds, 
such as are common in the European Jurassic, are \vanting. The Conifei'CB are re- 
presented by a great number of specimens but rather few determinable species. 
Finally, there should be mentioned the very peculiar plant described under the new 
generic name Schizolepidella, of which the affinities are entirely unknown. 
In the table all the plants described above are enumerated. For comparison this 
table indicates the occurrence in some of the most important Mesozoic floras of the 
world not only of the Hope Bay species but also of other species with which these 
may be compared. 
The Jurassic age of the Hope Bay Flora is evident at the first glance and is 
confirmed by a closer comparison with other floras of that epoch. As Professor 
NathorST has already pointed out in his first report, the close affinity to the Fower 
Oolite flora of England is the most prominent feature. On the principles of classi- 
fication here adopted, the following 9 species are identical: 
Sagcnopteris pancifolia (Phill.) 
Toditcs Willianisoni (Brgn.) 
Cladophlebis denticulata (Brgn.) 
» arguta (FiNDL. & HUTT.) 
Cladophlebis {Eboracia?) lobifolia (VuiLl..) 
» {Klukia?) exilis (Phill.) 
Coniopteris hynienophylloides (Brgn.) 
Sphenoptcris {Ricffordiar) Coeppertilbljl^iK. 
Ptilophylhim pectinoides (Phill.) 
It should be remembered that the species have been somewhat narrowly delimited, 
and that it has been preferred to give separate names to such forms as do not en- 
tirely agree with the English ones. The affinity is therefore possibly closer than is 
indicated by the above list. In the table, most of these species are recorded 
also in the column for the Rhætic-Fiassic floras of Europe. This is mostly due 
to their occurrence in the fossil flora at Bagaa in Bornholm, which is regarded by 
