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Wednesday, December 18th, 1867. — Mr. W. L. Carpenter, 
President, in the chair. 
The minutes of the last meeting, relating to the publication of the 
Society's Proceedings, were approved. 
Mr. Charles Hill, and Mr. William Budgett, were proposed as members 
to be ballotted for at the January meeting. 
The Hon. Secretary laid on the table a quantity of sand rich in 
Diatomacese, and of fossil Polyzoa, both from Warnhambool, Australia, for 
distribution amongst the members. A quantity still remains, which may 
be obtained on application to Mr. Fedden. 
Mr. E. A. Praeger read a preliminary notice of some points in the 
microscopic examination of human teeth, and promised to continue the 
subject at the February meeting. The publication of this paper is there 
fore deferred. 
ON FLOSCULARIA CAMPANULATA, 
By C. T. HUDSON, M.A., LL.D., 
Read October 16th, 1867. 
Floscularia can generally be procured in the Autumn from the pond 
in Caraway's nursery gardens, and this year it was very abundant on the 
algae attached to the stems and under-surfaces of the leaves of the plants 
growing in the pond. The species was F. Campanulata, which has been 
well described by Dr. Dobie in the Annals of Natural History vol. 4, 
1849 ; but he has left several points of this Rotifer's structure undeter- 
mined, and some of these its fortunate abundance this autumn has 
permitted me to clear up. 
In the first place Floscularia, up to the present time, has been held to 
be in the anomalous position of a Rotifer, whose rotatory organ does not 
rotate. The five lobes of the trochal disc are fringed with very fine long 
hairs, which are generally extended and motionless ; in figs, (l)and (2,) these 
setae are only drawn to three of the five lobes, in order to prevent any 
confusion in the figure ; they are also drawn only on the summits of the 
