126 PROCEEDINGS OF SOCIETIES. 
pared with those he had seen at an earlier period of the year, and 
which he had mentioned at a previous meeting; but he was not 
on that occasion able to exhibit to the Club any actual specimens, 
yet the polymorphous condition, and slight locomotive power of 
the gonidia now exhibited were sufficiently evident. 
Dr. J. Barker could confirm the truth of these observations; he 
had himself, on a previous occasion, seen the transformed gonidia 
of some specimens of Volvox move reptantly about, seemingly to 
all intents and purposes as veritable Amcebe. 
Dr. Frazer exhibited two specimens of diseased hairs; the first 
example of hair growing on a patch of baldness caused by Tinea 
tonsurans, the upper part white, the shaft gradually acquiring a 
dark colour towards the base; the second being a diseased hair, 
with atrophy of the bulb, taken from a bald patch resulting from 
Alopecia areata, and intended to show the state of extremely im- 
paired nutrition of the hair. 
Mr. Archer showed fruited examples, with oogonia and the dwarf 
male plants, of Gdogoniwm Brauni ; also the seemingly rare, mi- 
nute little plant, Polyedrium tetraedricum (Nag.). (See ‘Gattungen 
einzelliger Algen,’ p. 83, t. iv, B. 3.) 
Captain Hutton exhibited fruited specimens of Metzgeria fur- 
cata, rarely met with in a fertile condition, although the plant is 
common. He showed the fruit nicely under the binocular. 
Dr. Richardson showed various Desmids in good condition, 
mounted five years ago in glycerine and a trace of liquor potasse. 
Mr. Yeates exhibited Smith and Beck’s new metallic reflector 
for opaque objects, which seemed to be very satisfactory. 
October 19th, 1865. 
Read the minutes of last meeting, which were signed. 
Captain F. W. Hutton presented a list of Diatomaceze found 
by him in the washings of a small portion of seaweed from China. 
The material had not been boiled, but steeped in weak acid. 
The specimens shown were very clean, and many very pretty. 
The following is the list :— Aimantidium ’; Amphicampa 
mirabilis; Licmophora, sp.; Grammatophora serpentina; Gram- 
matophora marina; Grammatophora hamulifera; Melosira, sp. ; 
Coscinodiscus limbatus ; Arachnoidiscus Ehrenbergu ; Biddulphia 
pulchella; Cocconeis pseudomarginatus; Cocconeis scutellum; Coc- 
coneis pretexta; Achnanthes? sp.; Navicula didyma; Navicula, 
sp.; Pinnularia, sp. This seaweed had been obtained by Captain 
Hutton in February, 1864, but he felt satisfied that it could not 
