40 The London Botariical Society . 
Bartholin, 1 on this northern type of Jurassic vegetation. The Flora 
in question is undoubtedly of Jurassic age, possessing many features 
in common with the rich flora from the inferior Oolite rocks of the 
Yorkshire Coast and containing several elements suggesting a 
comparison with the older Rhaitic floras of Scania and Franconia. 
A comparison of Rhaetic and Inferior Oolite floras demonstrates 
a close agreement as regards general composition between the 
vegetation of these two periods of the Mesozoic epoch. Among the 
Bornholm ferns we find an example of the Marattiaceae, a family no 
longer existing in the European region ; several representatives of 
the Dipteridinae, a section of ferns containing the single surviving 
genus Dipteris which is practically confined to India and Malaya. 
The Matonineae, another family of ferns with the solitary living 
genus Matonia, restricted to the Malay Peninsula and Archipelago, 
is represented by specimens hardly distinguishable from the recent 
species Matonia pectinate. Numerous Cycadean fronds point to the 
prominent place in the Jurassic vegetation of Northern Europe 
occupied by extinct forms of a group now confined to the tropics, 
and consisting of a mere handful of more or less rare species. The 
existing Maiden-Hair tree—a type that perhaps no longer occurs as 
a wild plant—is another illustration of an ancient stock (the 
Ginkgoales), which has left clear traces in the Bornholm rocks. The 
Coniferas, often among the least satisfactory of fossil plants, are for 
the most part represented by fragments of vegetative shoots only, 
and cannot be determined with certainty. We notice, however, that 
such forms as occur do not agree in their vegetative character with 
the existing Abietineae, a section of the Coniferae which appears to be 
of more recent origin than the Araucarieae and other families. 
A C.S. 
1 Nogle i den bornholmske Juraformation forekommende 
Planteforsteninger. Bot. Tidsskrift. Bd. XVIII. and XIX., 
Copenhagen , 1S92-94. 
THE LONDON BOTANICAL SOCIETY. 
ff^HE Botanical Society founded by Professor Farmer some three 
; or four years ago for the more or less informal communication 
and discussion of the preliminary results of work done by its 
members, and of any other matters of botanical interest, steadily 
continues its useful career. Its meetings are usually held in the 
Biological lecture-room at the Royal College of Science, South 
Kensington, once in every month during the working year, and It is 
thought that short reports of the proceedings may interest the 
readers of the New Phytologist, and Professor Farmer’s consent 
having been obtained, a brief outline of the meetings will in future 
