Squirrel, length of life of, [14].
Stahl, on protective structures in plants, [260].
Strasburger, on fertilization of Phanerogams, [178], [340], [355];
on cyto-idioplasm, [181];
on influence of nuclei, [184];
on identity of daughter nuclei, [187];
on nuclei of sexual-cells, [200], [215], [246];
on transmission of germ-plasm, [209];
on cell-division in Spirogyra, [216];
on development of pollen-grains, [222];