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A Text-Book 
General Lichenology 
WitTH DESCRIPTIONS AND FIGURES OF THE GENERA 
OCCURRING IN ‘THE 
NORTHEASTERN UNITED STATES. 
BY 
ALBERT SCHNEIDER, M.5S., M. D. 
The only modern work on North American Lichens, including a dis- 
cussion of their Morphology and Physiology, with a special reference to 
the phenomena of symbiosis. 
Large octavo, 230 pages, 76 full-page plates. Price in paper, net, 
$3.80 ; in cloth, $4.25. Soi = 
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BINGHAMTON, N, Y. 
Chapman’s Southern Flora. 
Third Edition. 
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