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MICROSCOPICAL AND NATURAL HISTORY SECTION. 
March 13th, 1882. 
Alfred Brothers, F.R.A.S., President of the Section, 
in the Chair. 
Mr. Theodore Sington, of Victoria Road, Rusholme, was 
elected an Associate of the Section. 
Mr. Marcus M. Hartog, B.Sc., F.L.S., made a communi- 
cation upon Water Fleas. 
“On Cyproea Guttata (Gmel.),” by J. Cosmo Melyill, 
F.L.S. 
This shell has been for the last two hundred or more 
years esteemed as one of the most choice and rare in exist- 
ence. It is strange that even in these days it is almost 
unique, and in company with another shell of the same 
genus (Cyproea princeps (Brod.), from the Persian Gulf), and 
the far-famed Conus gloria maris (Chem.), always commands 
a higher price than any other shells. 
There are but three Cyproea princeps known, two of 
which are in our national collection, which also boasts of 
the unique C. leucodon (Brod.), while there are twelve or 
thirteen of the Conus gloria maris. Allowing therefore for 
the Cyproea princeps and leucodon at present to hold the 
first post of honour, the Cyproea guttata, the subject of this 
notice, will stand next in degree of rarity, there being but 
six known, viz., the specimen now exhibited, from my 
collection, one in the British Museum, two in the famous 
