12*2 
MICROSCOPICAL SECTION. 
April 20th, 1863. 
Professor Williamson, F.R.S., President of the Section, 
in the Chair. 
Mr. Charles O’Neill, F.C.S., and Mr. John Shae Perring, 
M.Inst.C.E., were elected Members of the Section. 
Mr. John Slagg, jun., and Mr. H. A. Hurst, were elected 
auditors of the Treasurer’s accounts. 
Mr. Alfred Fryer presented for distribution amongst the 
members a number of impressions of an engraving of the 
Acarus sacchari found in raw grocery sugar, from Mauritius. 
Mr. Brothers stated that he had made some observations 
upon the circulation in plants, and he found that a degree of 
heat which would cause free circulation in Yallisneria, en- 
tirely destroyed it in Chara vulgata. Mr. Brothers also 
described the appearances presented by the cilia of Melicerta 
ringens, which he had the unusual opportunity of observing 
whilst the animal was outside its case in a dying state. As 
the motion of the cilia gradually became fitful and then 
ceased, it was apparent that the cilia of the inner row are 
much longer than those of the outer row, over which the 
former appear to bend and to brush off whatever may be 
adhering to them into the channel between the two rows. 
Thus are produced the wavy lines and apparent onward 
progression of the cilia, which render this, under suitable 
illumination, so brilliant and interesting a microscopical object. 
