THE Bulletin de l'Academic Impiriale des Sciences; de St. Petersbourg, xvii., No. 2, commences with a proposed new classification of the Balsenoidea, by J.F. Brandt, with the view of including extinct forms recently met with in Central and Southern Europe, and in Central Asia. He bases it mainly on skeleton structure, with special reference to form of cranium: The next paper contains some algological studies by Christopher Gobi. He describes how moisture, with heat and light, acts on chlorophyll in the cells of Chroolepus, accumulating it at the periphery, and leaving a nucleus of red pigment at the centre: He also describes a new species of the plant, which he terms Chroolepus uncinates. It is found on the maple, ash, and linden, and its chief characteristic is a hook-shaped zoosporangium with subsporangial cell at the end of a series of irregular cylindrical-shaped cells forming the stalk; The growth of the zoosporangia takes place only at night. This new species is most closely allied to the C. umbrinus. —C. J. Maximowicz gives a full description, in Latin, of certain plants in japan and Mandshuria. —The last paper is by C; J. Max-i mowicz, on the influence of strange pollen on the form of fruit. He experimented with two very distinct species of lily, L. davuricum and L, bulbiferum, kept in a room warmed by sunlight. He fertilised the flower of each with pollen from the other, and the process was repeated in several individuals. When the capsules developed, each was found to have the form characteristic of the other plant. The form of the seeds in both was intermediate between those of the parents.