211 
Mr. Suffolk exhibited and described Muller’s new growing 
slide. 
Mr. Slack described a new rotating stage as fitted to cheap 
microscopes by Messrs. Beck. 
Mr. luce read a short paper by George Gulliver, Esq., F.R.S., 
“ On the Fibres of the Crystalline Lens.” 
Alfred Saunders, Esq., read a paper “ On Zoospores of Crusta- 
cea.” 
Quekett Microscopical Club. 
December 1868. Mr. Arthur E. Durham, President, in 
the chair. — Mr. John Hopkinson read a paper “ On British 
Graptolites,” a group of fossil zoophytes exclusively confined to 
Silurian rocks. After a brief introduction on their geological and 
geographical range, he entered fully into the structure of the 
different forms, and gave a concise history of the establishment of 
the British genera, noticing the various opinions that have been 
entertained as to their zoological position. The genera were 
described and grouped into four families. The Graptolitidce were 
then showed to be Uydrozoa, nearly allied in structure, develop- 
ment, and probably in their mode of reproduction, to the Sertu- 
lariadcc. 
In conclusion, it was argued that the existence of hydroid 
zoophytes in the Silurian seas, and their complete disappearance 
until a very recent period, could not be explained by the Dar- 
winian theory of the origin of species. 
Specimens of thirty species, and diagrams showing the distinc- 
tive characters of each genus, were exhibited. 
Mr. Samuel Roberts described a new form of micrometer, con- 
sisting of a tube mounted on a separate stand, which, when placed 
at the side of the ordiuary monocular microscope, enabled the 
observer to look down it with one eye, while the other was occu- 
pied with the object. 
A discussion ensued, and the thanks of the meeting were given 
to Messrs. Hopkinson and Roberts. 
Mr. J. Eldridge presented the club with a quantity of unmounted 
specimens for distribution amongst the members. 
Sixteen gentlemen were elected as members. 
January 22nd, 1869. The President in the chair. — The Presi- 
dent announced that a society, upon the basis of the Quekett 
Microscopical Club, had been formed at Liverpool with the 
greatest success; and Mr. M. C. Cooke, Secretary for Foreign 
Correspondence, informed the meeting that a similar society had 
been established at Chicago (Illinois), U.S. He also announced 
that his class for the study of microscopical fungi would be held 
in a room which Mr. Wheldon had kindly placed at his disposal. 
Mr. George read a paper by Mr. Holmes “ On a New Form of 
