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Contents: Fossil Mollusks and Diatoms from the Dismal Swamp, Va., by Lewis Woolman; Hyalodendron navalium, a new Genus and Species of Euplectellid Sponge, by J. Percy Moore; Environmental and Sexual Dimorphism in Crepidula, by Edwin G. Conklin, Ph.D.; Contributions to a Knowledge of the Hymenoptera of Brazil, No. 5, by William J. Fox; New Cretaceous Fossils from an Artesian Well-Boring at Mount Laurel, N.J., by C.W. Johnson; A Memorial of Dr. Joseph Leidy, by Edward J. Nolan, M.D.; New Species of Diatoms, by Charles S. Boyer; New Species of Odontostomus from Brazil and Argentina, by Henry A. Pilsbry; Some Cuban Species of Cerion, by H.A. Pilsbry and E.G. Vanatta; Occurrence of Oryzomys palustris in Southern New Jersey, by Witmer Stone; The Growth of Viburnum lantanoides Michx., by Ida A. Keller; The Occurrence of Marcasite in the Raritan Formation, N.J., by S. Harbert Hamilton; Margarita Sharpii, a new Alaskan Gastropod, by Henry A. Pilsbry; Observations on the Classification of Birds, by Dr. R.W. Shufeldt. Illus.
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