Scientific Serials

Abstract

Bulletin de la Société des Natiiralistes de Moscou, 1886, No. 3. —On two great comets (41 and 42) of 1886, by Th. Bredichin (in French).—On the Agromyza lateralis and its metamorphoses, by Prof. Lindeman (in German).—On the iron-bearing mud of Lipetzk, by E. Kislakovsky. It appears much like that of Franzensbad in Germany, and especially that of Ciechocinek in Poland.—On the Ammonites of the group Olcostephanus versicolor (Trautschold), by Mary Pavlow (in French, with two plates). Studying a rich collection of Ammonites versicolor, some of which reach 8 inches in diameter, while others have the size of a pin's head, the author considers them as belonging to the genus Olcostephanus, and establishes the following species, of which the last three are new: O. versicolor, elatus, subinversus, inversus, and coronatiformis.— On the importance of oxygen for plants, by W. Palladin (summed up in German). An elaborate research into the amount of matter destroyed in consequence of fermentation in an atmosphere devoid of oxygen, as also into the relations between the breathing of plants and their growth.—On the dynamic centra of a rotation-ellipsoid, with relation to earth, by K. Weihrauch, being a mathematical inquiry (in German) from which it results that the centres of attraction are situated the earth nearer to the centre of figure than would be the case in an homogeneous ellipsoid of the same average density. —On the Algæ of Moscow, by A. Artari (in French), being a continuation of a former publication, and containing a list of eighty-five more species, chiefly Bacillariaceæ.—On the fauna of the lakes of the Slavyansk mineral waters, by P. Stepanoff. The fauna is mixed and contains representatives both of fresh-water and marine species, these latter being chiefly found amidst the Infusoriæ.—The annual report of the Society contains obituary notices of the late President of the Society, Dr. Renard.