106 • Geological Society. 



PROCEEDINGS OF LEARNED SOCIETIES. 



GEOLOGICAL SOCIETY. 



June 5, 1889.— Prof. J. W. Judd, F.R.S., 

 Vice-President, in the Chair. 



The following communications were rend : — 



1. " Observations on some undescribed Lacustrine Deposits at 

 Saint Cross, Southelmham, in Suffolk." By Charles Candler, Esq. 

 (Communicated by Clement Reid, Esq., F.G.S.) 



These deposits are situated in the basin of the River Waveney, 

 3f miles P]. by N. of Harleston, and 9 miles E.N.E. of Hoxne. They 

 occupy a hollow in the Boulder-clay towards the northern edge of the 

 plateau locally known as " High Suffolk." Saint Cross brickyard, 

 which is the only section now visible, shows : — 



ft. 



a. Surface soil and gravel 1-3 



b. Red and white loam, variable, fine or coarse, sandy or cal- 



careous. Elephant, Horse, &c. at base of the bed 3-6 



c. Fine, tenacious, grey and red clay, with carbonaceous seams 



towards the base. Valvata, Bythinia, I'isidixm 2-5 



d. Black peaty loam and sand, worked to a depth of 5 feet, but 



no bottom reached. Seeds and freshwater shells 5- 



e. Chalky Boulder Clay 



No implements have yet been found in any of the beds ; but 

 Pleistocene Mammalia (determined by Mr. E. T. Newton) occur in 

 bed h. From bed d Mr. Clement Reid obtained seeds of 29 species 

 of flowering plants. These are all marsh or aquatic species, except the 

 hawthorn and dandelion. Unlike those found in Prof. Prestwich's 

 bed d at Hoxne, there are no Arctic forms among them ; but the 

 Author pointed out that the Arctic plants of Hoxne were determined 

 from leaves found in laminated clays, while the matrix in which the 

 plants are found at St. Cross is only suitable for the preservation of 

 seeds. However, certain of the plants do not range far north, and 

 the occurrence of a large tree in the upper part of bed d. points to a less 

 rigorous climate than that under which the leaf-bearing beds at 

 Hoxne were deposited. 



The lacustrine beds now occupy a ridge between two depressions, 

 the valleys having been deeply eroded, or perhaps formed since the 

 filling-up of the lake. It appears probable that on the final retreat 

 of the last ice-sheet the hollows of the Boulder- clay were occupied 

 by a series of lakes and pools. For the most part the sedimentary 

 deposits formed in these hollows have been entirely swept away ; 

 but at Saint Cross the mud and loam of one such lake have been 

 preserved. 



2. " On certain Chelonian Remains from the Wealden and Pur- 

 beck." By R. Lydekker, Esq., B.A., F.G.S. 



In the first part of the paper the Author described a portion of 



