[56] Studien über Cordillerengesteine. Apolda, 1875. [57] Reisen in den Cordilleren der argentinischen Republik, Verh. der Gesellsch. für Erdkunde. Berlin, 1891. [58] Untersuchungen an altkrystallinen Schiefergestenien aus dem Gebiete der argentinischen Republik, von B. Kühn. Neues Jahrbuch für Min., etc., Beit. Bd. VII., 1891, p. 295. [59] Untersuchung argentinischer Pegmatite, etc., von P. Sabersky, _ib._, p. 359. [60] Untersuchungen an argentinischen Graniten, etc., von J. Romberg, _ib._, VIII., pp. _ANALYTICAL ABSTRACTS OF CURRENT LITERATURE._[61] _A New Tæniopteroid Fern and its Allies._ By DAVID WHITE. (Bulletin Geological Society of America, 4 pp., 119–122, pl. I.). Mr. White has described, under the name of _Tæniopteris missouriensis_, a new and well characterized fern from the Lower Coal-measures in the vicinity of Clinton, Henry County, Missouri. Botanically, it is of particular interest in that it combines the so-called tæniopteroid and alethopteroid types of structure, while geologically it is of much value in supplying a readily identified stratigraphic mark in a part of the Carboniferous not especially rich in fossil plants. After thoroughly describing it and considering its specific and generic resemblances, the author discusses at length its suggested genetic relations and represents in a graphic manner a scheme of its probable ancestors and line of descent. F. H. K. * * * * * _Rainfall Types of the United States._ Annual Report by Vice-President GENERAL A. W. GREELY. (The National Geographic Magazine. Vol. V., April 29, 1893, pp. 45–58 pl. 20). The paper confines itself to the characteristic distribution of precipitation throughout the year and gives the rainfall types of the country.