Fine structure of the spermatozoid of two mosses, with special reference to the so-called „Nebenkern“

Allen, C. E., 1917: The spermatogenesis ofPolytrichum juniperinum. Ann. Bot.31, 269–292. Beams, H. W., T. N. Tahmisian, R. L. Devine and L. E. Roth, 1954: Phase contrast and electron microscope studies on the nebenkern of the grasshopper. Biol. Bull.107, 47. Chambers, R., 1915: Microdisection studies of the germ cell. Science41, 290–293. Ikeno, S., 1903: Die Spermatogenese vonMarchantia Polymorpha. Beih. Bot. Cbl.15, 65–88. La Vallette St. George, A., 1886: Spermatologische Beiträge. Zweite Mitteilung. Arch. Mikr. Anat.28, 1. Popoff, M., 1907: Eibildung beiPaludina vivipara und Chromidien beiPaludina undHelix. Mit Anhang: Zu der Frage nach dem Spermatozoendimorphismus beiPaludina vivipara. Arch. Mikr. Anat.70, 43–129. De Robertis, E., and H. Franco Raffo, 1957: Submicroscopic organization of the mitochondrial body and other cytoplasmic structures of insect testis. Exper. Cell Res.12, 66–79. Sun, C. N., 1960: A demonstration, by electron microscopy of plasmodesmata in the embryonic leaf cell walls ofCibotium Chamissoi. Bull. Torrey Club87, 337–341. Tahmisian, T. N., E. L. Powers and R. L. Devine, 1956: Light and electron microscope studies of morphological changes of mitochondria during spermatogenesis in the grasshopper. J. Biophys. Biochem. Cytol.2, Suppl. 325–329. Yasusumi, G., W. Fujmura and H. Ishida, 1958: Spermatogenesis in animal as revealed by electron microscopy. Exper. Cell Res.14. 268–285. Wilson, M., 1911: Spermatogenesis in the Bryorphyta. Ann. Bot.25, 415–457.