The President's Address. 
71 
Mr. Gibbons, of Melbourne, On a New Method of 
Micrometry. 
Mr. Warington, On some New Arrangements of his 
Portable Microscope. 
The papers on Microscopic Plants are — 
Colonel Baddeley, On some Diatomacese found in Nocti- 
luca miliaris, and the best means of obtaining them. 
Dr. Walker-Arnott has communicated a note on Campy- 
lodiscus Hodgsoni. 
Mr. Okeden, On the Diatomacese of South Wales. 
Mr. Roper, On the genus Biddulphia and its affinities. 
Professor Henfrey, On Chlorosphsera^, a new genus of 
Unicellular Algae. 
Mr. Jabez Hogg, On Vegetable Parasites affecting the 
Human Skin. 
On Microscopic Animals the two papers read were — 
Mr. Sydney Gibbons, On the Infusoria of the Tan Teen, 
near Melbourne, in Australia. 
Dr. Ferdinand Cohn, On the Reproduction of Nassula 
elegans. 
On the Structure of Animals the two papers were — 
Professor Kdlliker, On the Luminous Organs of the 
Glow-worm. 
Lieutenant Mitchell, On a New Porm of Circulating 
Apparatus in a species of Nepadse. 
On general subjects the two papers were — 
Dr. TVallich's Account of Microscopical Observations 
and Collections made during a Residence in India and the 
Voyage home. 
Mr. Lobb, On the connecting link between the Animal 
and Vegetable Kingdoms. 
These papers are, I think, both on account of their in- 
trinsic merits and the variety of subjects embraced, a suffi- 
cient evidence that, whatever may have been the amount of 
microscopical observation carried on elsewhere and encouraged 
by other societies, the Microscopical Society still commands 
the interest of competent observers, and has still functions to 
perform in relation to the advancement of science. 
It is a pleasing duty for me to have to inform you that the 
number of your members has increased during the past year. 
The number of members at the last anniversary was 267. 
During the past year we have elected 23 new members, 
making in all 290 members. But from this number we have 
to deduct 14. Ten have resigned or been struck off the list 
of members, and four have died, so that our effective force is 
now 276. I believe this is the largest number of members 
