Beports and Proceedings — Geological Society of London. 329 



The following gives the succession of the beds as shown in the 

 river bank and on the sides of a lateral ravine : 



{a) Surface layer of humus. 

 {b) Yellow sand with thiu partings of clay, 1^ m. 

 (c) Yellowish-grey sands with erratic "blocks of Northern origin, 

 from Finland, Olonetz, &c., 3| m. 

 Lacustrine (d) ( .\ A ^^'^'1^?^:^™^'! clay bed,"'becoming yellowish -grey below, 

 denosit i (xreenisn- brown and grey beds. 



^ ■ I III. Very sandy, dark-green and grey beds with layers of turf, 



(e) Thin layer of reddish-brown loam. 



(/) Reddish -brown, yellow, and clear sands with erratics of Northern 

 rocks ; in the upper portion sandy concretions with crystalline 

 erratics. 

 {g) Coarse glacial sand. 



{i) Red ferruginous sandstone with erratics of crystalline rocks. 

 {k) Jurassic beds (?) upper Volga horizon. 



The lacustrine beds are shown for a distance of about 100 metres, 

 and they have a maximum thickness of about 12 metres. In some 

 places organic materials are so abundant in the beds that they 

 resemble lignite, and are readily combustible. The plant-remains 

 in them include leaves of Quercus, Salix, Alnus, Betula, Gorylus, 

 Acer, Finns sylvestris, Nuphar luteum, and mosses. Fresh-water 

 species of diatoms are also extremely abundant The plants are 

 similar to those now living in the same area, but some forms are 

 more abundant than at present, which leads the author to conclude 

 that the climate of that time was somewhat milder and moister than 

 that of to-day. The animal-remains consist of wing-cases of beetles, 

 shells of Anodon, and teeth, bones and scales of fishes, principally 

 pike and perch. The Mammoth skeleton was found in an upright 

 position ; partly in the middle (II.) and partly in the lower bed 

 (III.) of the deposit. From the remains it would appear that the 

 flora and fauna of these inter-Glacial beds were substantially the same 

 as at present, and that only the large Mammoth has disappeared. 



The author has found traces of similar lacustrine materials at a 

 locality 3 kil. distant from Troiskoje, and in the river banks of other 

 places in Central Eussia deposits are known which will probably 

 prove to be of the same age as those described. 



The evidence of the deposition of these beds and of a temperate 

 climate, in a period intermediate between the formation of beds of 

 glacial character, seems clear and indisputable, and there can be no 

 doubt of their similarity to the inter-Glacial beds of Germany and 

 Western Europe. G. J. H. 



I2,:Bi^OK,TS -A-IsTID IF'S-OaJBIEIDIIsrca-S. 



Geological Society of London, 



I— May 25th, 1892.— W. H. Hudleston, Esq., M.A., F.E.S., 

 President, in the Chair. — The following communications were read : 



1. "On Delphinognathus conocephaliis (Seeley) from the Middle 

 Karoo Beds, Cape Colony, preserved in the South-African Museum, 

 Capetown." By Prof. H. G. Seeley, F.E.S., F.G.S. 



The skull described in this paper is believed by Mr, T. Bain to 



