eaiaaheien OF AMERICA. 
The first fasicle of the second p e Characeae of America is now ready. It con- 
tues descriptions of eight s' ecics of of Nitella, as follows: Nitella opaca Ag., obtusa Allen, 
eoteng Allen, Blankinshipii Missouriensis Alien, flexilis Ag., subglomerata 
it. and glomeruli ae aeath ourteen full-page illustrations (eight lithogra- 
drt and six ‘eae .) These fasicles will be issued from time to time as 
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