Front Matter
p. 0
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On Some American and Oriental Earthworms. Part II, Family Megascolecidae
Gates, G. E. pp. 99-116
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The Mechanism of Heredity in Relation to the Theory of Natural Selection
McAtee, W. L. pp. 117-120
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Petroleum in Southeastern Ohio
Miller, E. Willard pp. 121-134
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Book Notices
p. 134
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Composition of Fungus Hyphae IV : Phytophthora
Thomas, R. C. pp. 135-138
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Book Notices
p. 138
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Some Investigations of the Water Relations of Lichens
Scofield, Herbert T.; Yarman, Lawrence E. pp. 139-146
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Book Notices
p. 146
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Back Matter
p. 999
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