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Contents: Type land snails in the Academy of Natural Sciences of Philadelphia, II. Land pulmonata, exclusive of North America North of Mexico, by H. Burrington Baker; The fishes of the western Atlantic serranoid genus “Gramma,” by James E. Bohlke and John E. Randall; Derivation of the Antillean avifauna, by James Bond; Ecophenes of “Schizothrix calcicola” (Oscillatoriaceae), by Francis Drouet; Pleistocene sedimentation and fauna of the Argentine shelf, by Charles Fray, Maurice Ewing, Horace G. Richards, and James R. Craig; The naturalist as an art critic, by G. Evelyn Hutchinson; A preliminary analysis of the lines of the super-tribe “Melanoplini (Orthoptera; Acrididae; Cyrtacanthacridinae), by James A. G. Rehn and Robert L. Randell; A biosystematic study of the “Scirpus cyperinus” complex, by Alfred E. Schuyler; Observations on West Indian birds, by Albert Schwartz and Ronald F. Klinikowski; The apparent reduction in number of precaudal vertebrae in Trunkfishes (Ostraciontoidea, Plectognathi), by James C. Tyler. Illus.
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