The Sperm Nuclei of Lilium
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... out Early Journal Content at http://about.jstor.org/participate--jstor/individuals/early-journal--content. JSTOR is a digital library of academic journals, books, and primary source objects. JSTOR helps people discover, use, and build upon a wide range of content through a powerful research and teaching platform, and preserves this content for future generations. JSTOR is part of ITHAKA, a not--for--profit organization that also includes Ithaka S+R and Portico. For more information about JSTOR, please contact firstname.lastname@example.org. I9II] CURRENT LITERATURE 165 MODILEWSKII6 has also described a i6-nucleate embryo sac in Gunnera chilensis, in which case the four megaspores, not separated by walls, all take part in forming the embryo sac. Although no definite proof was obtained, he believed the embryos to be parthenogenetic. An interesting embryo sac is described by DESSIATOFF,I7 who finds i6 nuclei in Euphorbia virgata at the fertilization period. The i6 nuclei come from one megaspore, and consequently the situation is somewhat different from that found in Peperomia, where 4 megaspores enter into the formation of the sac. The I6 nuclei are arranged in four groups of four each, and one nucleus from each group moves to the center of the sac, where the four fuse to form the endosperm nucleus. There are three antipodals, and an egg apparatus of two synergids, and an egg. The two other groups remain at the side of the sac and resemble the egg apparatus. In general, this embryo sac resembles that of the Penaeaceae as described by Miss STEPHENS.-CHARLES J. CHAMBERLAIN. I9 HEILBRONN, ALFRED, Apogamie, Bastardierung, und Erblichkeitsverhaltnisse bei einigen Farnen. Flora (n.s.) I: I-42. figs. 43. IW1O. 20 FISCHER, HUGO, Wasserkulturen von Farnprothallien, mit Bemerkungen tiber die Bedingungen der Sporenkeimung. Beih. Bot. Centralbl. 27':54-59. I9II.