Front Matter
p. 0
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New Species and Varieties of Freshwater Algae from China
Li, Liang Ching pp. 151-155
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The Genus Zygogonium
Transeau, Edgar Nelson pp. 156-162
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Distribution and Flowering in Wolffia Papulifera
Camp, W. H. p. 163
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Some Effects of Varying Amounts of Nitrogen on the Growth of Tulip Poplar Seedlings
Chapman, A. G. pp. 164-181
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Color in Various Plant Structures and the So-Called Principle of Selective Adaptation : Studies in Determinate Evolution, VII
Schaffner, John H. pp. 182-191
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Two New Species of Earthworms for Ohio
Olson, Henry W. pp. 192-193
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Apparatus for the Maintenance of Constant Temperature and Humidity
Eagleson, C. W. pp. 194-203
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Additions to the Ohio List of Robber Flies (Diptera: Asilidae)
Bromley, Stanley W. p. 204
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Notes on a Collection of Myxomycetes from Southeastern Michigan
Chapman, Floyd B. pp. 205-207
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Flora in the Roof of the Upper Freeport Coal at Callahan's Mine, Teegarden, Ohio
Berry, Willard pp. 208-209
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The Genus Agellus, Gen. Nov. (Homoptera, Cicadellidae)
DeLong, Dwight M.; Davidson, Ralph Howard pp. 210-214
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Back Matter
p. 999
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