Monthly Mlcroscoplcall 
Journal, March 1, 1869. J 
PROCEEDINGS OF SOCIETIES. 
197 
Mr. Armstrong exhibiting a series of slides, the Glarden Spider 
and its dissections. 
Mr. Wilmot exhibiting parasites from Argulus foliaceus. 
Several presentations were made to the Society's Cabinet by Messrs. 
Armstrong, Hope, Aylward, and Hyde. 
Brighton and Sussex Natural History Society. 
February 11th, the President, Mr. Glaisyer, in the chair. — A 
discussion on the nature and origin of flint; after which, a series 
of objects illustrative of the different ways in which silex or flint 
is met with in nature, was shown under microscopes by the following 
gentlemen : — 
Mr. E. Smith exhibited sections of flint, containing Xanthidia, 
corals, sponge spicules, and dendritic oxides, commonly called Moss 
agates ; and chert containing Pixidularia and other organisms. 
Mr. J. Dennant showed a mass of silex found among the ashes of 
a wheat-stack destroyed by fire, and siliceous cuticles of wheat, Indian 
corn, and Equisetum. 
Mr. E. Glaisyer exhibited Polycistina from Barbadoes deposit; 
stellate hairs of Deutzia scabra and D. gracilis, on young leaves, in 
which the scales were packed close together; disintegrated glass, 
showing markings similar to those on some diatoms and sections of 
silicified coniferous wood. 
Mr. Hennah showed sections of flint containing a sponge, Siphonia 
pyriformis, and seed-vessels ; sections of quartz through the optic axis, 
by which the coloured rings were shown ; and artificial diatoms obtained 
from a gaseous condition of silex by the process described by Max 
Schultze, in which markings similar to those on real diatoms were 
seen. These objects were exhibited under one of E. and J. Beck's 
new large microscopes, with concentric rotating stage and iris dia- 
phragm, which was kindly lent by Mr. J. Beck for the occasion. There 
was an especial interest attached to the iris diaphragm, as it was the 
invention of Mr. J. Brown, a member of the Society. 
Mr. T. Cooper exhibited recent and fossil sponge spicules and 
gemmules. 
Mr. Wonfor showed Foraminifera in flint ; sponge spicules, Fora- 
minifera, and portions of corals, found in a hollow flint nodule ; and 
MoUer's Diatom Type Slide, very kindly lent for the occasion by 
Mr. T. Curteis, of Holborn, and which was pronounced a marvellous 
example of human ingenuity, arrangement, and clean preparation. 
Bristol Microscopical Society. 
Wednesday, 20th Jan., 1869, 
Mr. W. J. Fedden, Vice-President, in the chair. — The minutes 
of the last meeting having been read and confirmed, Mr. W. L. 
Carpenter, B.A., B.Sc, presented and described to the Society some 
objects sent for the Society's cabinet by Dr. Carpenter, of London. 
These consisted chiefly of specimens obtained by Dr. Carpenter in his 
recent dredging expedition. 
