17 
that there was a decided difference between them. The 
organic remains included in these nodules and pebbles become 
therefore, a valuable and interesting subject for microscopical 
research, since, when carefully examined, they cannot fail to 
afford additional evidence of the great paleontological changes 
that occurred during the deposit of the chalk, a deposit ex- 
tending over such vast periods that it transcends all power of 
human calculation to form a conjecture, much less an ap- 
proximate estimate of its duration. 
The Lecturer exhibited a variety of specimens, some of 
the most interesting of which were examples of flint en- 
veloping flint, flint fractured and mended again, and echino- 
derms partly or wholly filled with flint, and the excess 
running over. 
An interesting discussion followed, in which Mr. Wuirt- 
TAKER (of ‘the geological survey of England), Captain Tver, 
and the Present took part. 
The Presipent exhibited some fossil oysters, recently 
dug up in Waddon New-road, from a depth of about 16 feet, 
apparently from a bed of sand similar to that, containing 
fossil oysters, which exists at Reading and other places. 
The following donations were announced :—‘‘ Smith’s 
Diatomacee,” 2 vols., and Mr. Richard Beck’s work on 
‘‘ The Achromatic Microscope,” by Messrs. R. and J. Beck ; 
‘The Transactions of the Quekett Microscopical Club,” by its 
Secretary ; Mr. Richter’s ‘‘ Photograph of Pond-life,” by Mr. 
Curties ; and by the Rev. J. B. Reade, F.R.5., President of the 
Royal Microscopical Society, his Address to that Society, 
Feb. 9th, 1870, in which he related the origin of the Micro- 
scopical Society of London. The following gentlemen were 
elected Members of the Club :—Dr. C. W. Philpot; Messrs. 
C. B. Pollard; C. Newton; T. R. Edridge, J.P.; G. F. 
Linney; W. H. Snelling; T. Bindley; J. Holmes; H. W. 
Whiffen; G. Whiffen; W.B. Tarrant; S. Baker; W. H. 
Olley; B. H. Ridge; W. Drummond ; and the Revds. D. 
Long and G. R. Roberts. 
_ May 14th, 1870.—Many of the members (amongst whom were the 
President and Treasurer) met at Carshalton s‘ation and fra- 
ternized with an excursion party of the Quekett Microscopical 
Club, who came from London to explore the Wandle and its 
tributaries, in search of fresh water organisms. The portion 
of the stream which flows through Mr. Cressingham’s garden 
was first visited, and although he was not at home admission 
was courteously given. The party next examined the lake in 
