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__ New Fossil Deposits of Diatomacee. 
The diatomaceous deposits of fossil marine forms recently dis- 
covered at Szent Peter and Struhar in Hungary, and Brunn in 
Moravia, have been attracting the attention of diatom students 
for some time past, on account of the new and rare forms which 
they contain, but a fossil marine deposit that is likely to prove of 
still greater interest is that from Oamaru, New Zealand. Messrs. 
Grove and Sturt have described and figured many of its forms in 
the last number of the Journal of the Quekett Microscopical 
Club, and expect to make an exhaustive study of the deposit. 
Mr. H. Morland, of Cranford, near Hounslow, England, who 
furnished the material to Messrs. Grove and Sturt, also kindly 
furnished the writer with a supply, and gives the following infor- 
mation in regard to the locality: ‘Oamaru is a town in the 
middle island of New Zealand, on the East coast, in 45° 8’, South 
latitude, and 171° East longitude. The material was found in the 
Cave valley, beneath a series of limestone strata known as the 
Otatara series, belonging to the Lower Tertiary.” Messrs. Grove 
and Sturt call attention to the curious fact that several of the 
species in the deposit have only been found previously in the 
famous deposit on the Cambridge estate, Barbadoes, also that 
some of the species found in the deposits from Simbirsk, Siberia, 
and Brunn, Moravia, occur in it with only slight variation. Some 
of the species found in it are still found living in the Indian Ocean. 
Over thirty distinct species of 7riceratium have been discovered 
in the deposit, and over forty species have been found that have 
never been described. As the material is imported into England 
for some industrial purpose, under the erroneous name of £aolin, 
it is probable that diatomists will be able ere long to secure 
abundant supplies of it. It is rather difficult material to clean, 
but amply repays for the trouble on account of the beauty and 
rarity of its forms. To break up the deposit, Mr. Morland re- 
commends the alternate boiling in caustic potash and sulphuric 
acid, as follows: ‘ Boil first in a strong solution of caustic potash, 
pour off the disintegrated portion into a beaker glass, and 
thoroughly wash the undissolved portion, pouring the water into 
the same beaker. Then boil in sulphuric acid and pour off the 
portions thus broken up into another beaker, carefully washing 
