THE INTERNAL PHENOMENA OF REPRODUCTION IN DROSOPHILA

摘要: The present paper is limited to a description of the internal phenomena reproduction in vinegar fly Drosophila melano gaster, comprising under this title ejaculation sperm by male, its storage seminal receptacles female, and discharge spermatozoa from latter, at time fertilization eggs. work was carried out Marine Biological Laboratory Woods Hole during summer 1919 suggestion Professor T. H. Morgan, whom I am indebted for advice helpful criticism, also valuable information gathered him his attempts bring artificial fly. An obstacle study experimental Droso phila high sensitiveness action fluids foreign body; they are easily injured killed when placed mixtures which do not exert noxious effects on other animals, unless kept such long time. Although tried repeatedly elim inate use several called “? indifferent― fluids, it impossible keep active beyond few minutes. During these experiments interesting data normal Drosophila, which, owing small size transparent condition generative organs,