Reports and Proceedings—Geological Society of London. 573 
These gravels are more or less sandy and often well stratified, and 
the author distinguishes from them some examples of a much more 
argillaceous type of deposit, which he suggests may be of the nature 
of a mud-flow, generated by rapid thawing of frozen soil at or about 
the time of maximum glaciation of the country further to the north. 
In the chapter on the valley gravel the author records several finds 
of implements at different places. The celebrated Knowle Farm pit 
is situated near Savernake in the south-west corner of the district. 
The implements from it are distinguished by a very peculiar varnish- 
like glaze, and Mr. Clement Reid, who described the locality, considered 
it to be contemporaneous with the Paleolithic deposits of Southampton 
Water, Bournemouth, and the Avon Valley. (Summary of Progress 
of the Geol. Survey for 1902, p. 208, 1903.) 
The Alluvium of the River Kennet, with its deposit of fossiliferous 
fresh-water marl, is of great interest, and a good account of it is given 
with lists of the fossils. It is further dealt with in a valuable note 
by Messrs. A. S. Kennard and B. B. Woodward, which is printed as an 
appendix to the memoir. 
Dr. W. Pollard and Mr. H. H. Thomas contribute another appendix 
on insoluble matter in samples of Upper Chalk, and the memoir 
concludes with a bibliography and an index. 
REPORTS AND PROCHEDINGS. 
GrotogicaL Socrery oF Lonpon. 
November 6th, 1907.—Sir Archibald Geikie, K.C.B., D.C.L., Sc.D... 
Sec. R.S., President, in the Chair. 
The following communications were read :— 
1. “On a Collection of Fossil Plants from South Africa.” By 
Professor Albert Charles Seward, M.A., F.R.S., F.G.S. 
The material on which this paper is based was, for the most part, 
collected by members of the Geological Survey in Cape Colony from 
the Molteno and Burghersdorp Beds. The Molteno Beds are placed 
at the base of the Upper Karroo, or Stormberg Series; the Burghers- 
dorp Beds constitute the uppermost strata of the Middle Karroo, or 
Beaufort Series. Mr. A. L. Du Toit, who has contributed accounts 
of the stratigraphy of the plant-bearing and associated rocks, describes 
the occurrence of a transitional zone between the Molteno and the 
Burghersdorp Beds. The following species are described :— 
(A) MourEeno Bens. 
Schizoneura Carrerei, Zeill. Teniopteris Carruthersi, Ten.- Woods. 
Schizoneura sp. Cladophlebis (Todites) Reesserti (Presl). 
Thinnfeldia odontopteroides (Morr.). Pterophyliun sp. 
Thinnfeldia sp. Baiera, sp. nov. 
Thinnfeldia, sp. nov. 
(B) BurcHEeRspore Beps. 
Schizoneura sp. Odontopteris, sp. Nov. 
Thinnfeldia, sp. nov. Strobilites, sp. nov. 
Teniopteris Carruthersi, Ten.-Woods.  Pterophyllum sp., ef. Pt. Tietzii, Schenk. 
Daneopsis Hughesii, Feist. Stigmatodendron, sp. Noy. 
