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POPULAK SCIENCE REVIEW. 
neither flattened nor covered with setae. Respiration appears to take place 
in the usual way through spiracles. Although 50,000 species of Hymen- 
optera are known, of which 3,500 live in Britain, until this time no 
aquatic species was known. 
The British Museum . — Professor Owen complains in his annual report 
of the want of space which causes choice rarities to be added perforce to 
the vaults intended for storage. The whole number of additional specimens 
is 28,273. 
