137 
Botanical Exhibits at the Royal Society. 
on Vegetation Survey, Mapping, and Ecology. Dr. T. W. Woodhead, 
who has been spending the last year at Zurich with Professor 
Schroter, will communicate a paper on “Ecological Work in 
Switzerland,” Mr. C. E. Moss will give an account of Survey Work 
and Mapping in Somersetshire, while Dr. Fritsch and Mr. Walker 
will contribute papers on Algal Ecology. 
Professor Wyndham Dunstan, F.R.S. is expected to give a 
general account of his work on hydrocyanic acid in metabolism, but 
it is not yet certain whether this will be presented to the Botanical 
or to the Chemical Section. Among other papers may be mentioned 
Professor H. H. W. Pearson’s on the Habitats and Habits of S. 
African Cycads, communicated by Mr. A. C. Seward, F.R.S. and 
Mr. Hugh Richardson’s on the Vegetation of Teneriffe. 
It is hoped that Dr. Blakeslee may be able to be present and 
give an account of his work on sexual differentiation in the 
Mucorineac and also of his important recent discoveries of sexual 
differentiation in the spores of Marchantia. 
SOME BOTANICAL EXHIBITS AT THE ROYAL 
SOCIETY CONVERSAZIONE. 
Fossil Plants from the English Coal Measures. 
I ^HIS was a collective exhibit of petrifactions from the well- 
known localities in Lancashire and Yorkshire, and it included 
important and novel contributions from a large number of those 
who are at present directing their attention to the field of Palaeo- 
botany. 
Dr. D. H. Scott sent specimens of the remarkable new stem 
which he has named Siitcliffia insignis —in honour of Mr. W. H. 
Sutcliffe, who has re-opened a disused coal-mine at Shore, Little- 
borough for the purposes of Palaso-botany, and upon whose property 
the specimen was found. The stem is a large one with solid central 
cylinders giving off a number of subsidiary steles from which the 
numerous bundles supplying the leaves arise. The leaf-bundles are 
so closely similar to those of Seward’s Racliiopteris WUlinmsoni 
that there can be little doubt that the latter must belong to another 
species of the same genus. The stem represents a new type of 
Medullosean structure which will be fully described in a forthcoming 
memoir now printing for the Linnean Society. 
