Reviews of: Bemerkungen über die Phylogenie der Schildkröten, by G. Baur; On the morphology of the skull of the Pelycosauria and the origin of the mammals, by G. Baur and E.C. Case; Ueber den Wirbelbau b. d. Reptilien u. e. a. Wirlbelthiere, by A. Götte; Psittacotherium, a member of a new and primitive suborder of Edentata, by J.L. Wortman; The Ganodonta and their relation to the Edentata, by J.L. Wortman; The Stylinodontia, a suborder of Eocene edentates, by O.C. Marsh.