selection. Bris_LioGrRApny.—Gregor Mendel, “ Versuche über Pflanzenhy- briden, ?” Verhandi. d. Natur-Vereins in Brunn, vol. r0 (1865); A. Weismann, The Evolution of the vegetation ranges from 32° to 48° Baumé (0-8642 to 0:7865 sp. gr.). 94 top of another 1,000 m. and the State of