574 Reports and Proceedings—Geological Society of London. 
A description is also given of Schizoneura africana, Feistmantel, 
a species originally figured by Hooker in an appendix to Bain’s paper, 
published in 1845. 
The additional plants recorded from the Molteno Beds afford 
further evidence in favour of assigning this member of the Stormberg 
Series to the Rheetic Period. While possessing certain Rheetic species, 
the Burghersdorp flora as a whole indicates a semewhat lower horizon. 
2. ‘¢Permo-Carboniferous Plants from Vereeniging (South Africa).”’ 
By Professor Albert Charles Seward, M.A., F.R.S., F.G.S., and 
Thomas Nicholas Leslie, F.G.S. 
The majority of the specimens described in this paper were obtained 
by Mr. Leslie from a sandstone quarry 14 miles from Vereeniging, on 
the banks of the Klip River; the sandstones are associated with 
shales, coal-seams, and glacial conglomerates. In the opinion of the 
authors, the plant-beds should be included in the Ecca Series (Lower 
Karroo). While recognizing certain well-marked differences between 
the Glossopteris floras and the Upper Carboniferous and Permian floras 
of the Northern hemisphere, they are inclined to think that there are 
more types common to the two botanical provinces than is generally 
supposed. 
The following species have been recognized at Vereeniging :— 
Schizoneura sp. Neuropteridium validiun, Feist. 
*Glossopteris angustifolia, Brongn., var. Bothrodendron Leslii, Sew. 
nov. * Leptdodendron, sp. nov. 
Glossopteris angustifolia, Brongn. * Lepidodendron Pedroanum (Carr.). 
Glossopteris Browniana, Brongn. Sigillaria Brardi, Brongn. 
Glossopteris indica, Schimp. Psygmophyllum Kidstoni, Sew. 
Glossopteris sp., cl. Gl. retifera, Feist. Cordaites (Neggerathiopsis)  Hislopi 
‘Gangomopteris cyclopteroides, Feist. (Bunb.). 
*Callipteridium sp. Conites, sp. 
Those marked with an asterisk are recorded for the first time. 
8. ‘On the Structure and Relations of the Laurentian System of 
Canada.” By Professor Frank Dawson Adams, D.Sc., F.R.S., F.G.S8.1 
This paper contains an outline of the results of the examination by | 
Dr. Barlow and the author of an area of 4,200 square miles, comprised 
within the Haliburton and Bancroft sheets of the Ontario and Quebec 
series of maps. The paper opens with a short account of Logan’s 
work in the original Laurentian area. The main conclusions reached 
by the author may be thus summarized :—(1) The Laurentian System 
of Sir William Logan consists of a very ancient series of sedimentary 
strata, largely limestones, invaded by great volumes of granite in the 
form of bathyliths; (2) this sedimentary series is one of the most 
important developments of the pre-Cambrian rocks in North America, 
it presents the greatest body of pre-Cambrian limestones on the 
continent, and it is best designated as the Grenville Series; (38) the 
invading masses of granite are of enormous extent; they possess 
a more or less distinct gneissose structure, due to the movements of 
the magma, which developed a fluidal and, in the later stages of 
intrusion, a protoclastic structure in the rock; (4) the granite gneiss 
of the bathyliths not only arched up the invaded strata into 
1 Communicated by permission of the Director of the Geological Survey of Canada. 
