314 Ishikawa.—Studies on the Embryo Sac 
due to Prof. G. F. Atkinson, Cornell University, Ithaca, for materials and 
for his kind help which made the present study possible. The writer also 
wishes to express his most sincere thanks to Dr. H. Takeda for his kind 
help in preparing this memoir for publication. 
Literature cited. 
1 . Arnoldi, W. : Zur Embryologie einiger Euphorbiaceen. Trav. Musee Bot., Acad. Imp. Sci. 
St-Petersbourg, vol. ix, 1912, pp. 136-54. 
2 . Bartlett, H. H.: Systematic Studies on Oenothera. III. Rhodora, vol. xv, 1913, pp. 81-5. 
3. Beer, R. : On the Development of the Pollen Grain and Anther of some Onagraceae. Beih. 
Bot. Centralbl., vol, xix, 1905, pp. 286-313. 
4 . Blackman, V. H., and Welsford, E. J.: Fertilization in Lilium. Ann. Bot., vol. xxvii, 1913, 
pp. m-14. 
6. Brown, W. H.: The Exchange of Material between Nucleus and Cytoplasm in Peperomia 
Sintensii. Bot. Gaz., vol. xl, 1910, pp. 189-94. 
6. Campbell, D. H.: The Embryo Sac of Aglaonema. Scottish Bot. Rev., vol. i, 1912. (Direct 
consultation has been impossible.) 
7 . Chamberlain, C. J.: Contribution to the Life-history of Lilium philadelphicum. II. Bot. 
Gaz., vol. xxiii, 1897, pp. 423-30. 
8. Chodat, R., et Bernard, C. : Sur le sac embryonnaire de YHelosis guayanensis. Journ. 
Botanique, vol. xiv, 1900, pp. 72-9. 
9 . Compton, R. H.: Note on a Case of Doubling of Embryo Sac, Pollen, and Embryo. Ann. 
Bot., vol. xxvi, 1912, pp. 243-4. 
10 . -: Phenomena and Problem of Self-sterility. New Phytologist, vol. xii, 1913, 
pp. 197-206. 
11 . Cook, M. T. : Notes on the Embryology of the Nymphaeaceae. Bot. Gaz., vol. xlviii, 1909, 
pp. 56-60. 
12 . Coulter, J. M.: Relation of Megaspores to Embryo Sacs in Angiosperms. Bot. Gaz., vol. xlv, 
1908, pp. 361-6. 
13 . Coulter, J. M., and Chamberlain, C. J.: Morphology of Angiosperms. Chicago, 1903. 
14 . Dahlgren, K. V. O.: Ein neuer Typus unter den Angiospermen. Arkiv for Botanik, vol. xiv, 
X 9 I 5 > PP- 1-10. 
15 . Davis, B. M.: The Reduction Division of Oenothera biennis. Ann. Bot., vol. xxiv, 1910, 
pp. 631-51. 
16 . Digby, L.: The Somatic, Premeiotic, and Meiotic Nuclear Division of Galtonia candicans. 
Ann. Bot., vol. xxiv, 1910, pp. 727-57. 
17 . Fischer, G. C. : Seed Development in the Genus Peperomia. Bull. Torrey Bot. Club, vol. xli, 
1914, pp. 137-56. 
18 . Fristendahl, A.: Cytologische und entwicklungsgeschichtliche Studien an Myricaria ger- 
manica. Desv. Kungl. Sv., Vetensk. Akad. Handl., vol. xlviii, 1912. 
19 . Gates, R. R. : A Fixing Fluid for Plant Tissues. Science, N. S., vol. xxi, 1910, p. 234. 
19 a.-: Mutation Factor in Evolution. London, 1915. 
20 . Geerts, T. H.: Beitrage zur Kenntniss der cytologischen Entwicklung von Oenothera 
Lamarckia 7 ta. Ber. Deut. Bot. Ges., vol. xxv, 1908, pp. 608-14. 
21 . - : Beitrage zur Kenntniss der Cytologie und der partiellen Sterilitat von Oenothera 
Lamarckiana. Rec. Trav. Bot. Neerlandais, vol. v, 1909, pp. 93-208. 
22 . Gibelli, G., et Ferreo, F.: Intomo alio sviluppo dell’ ovolo e del seme della Trapa natans, L. 
Malpighia, vol. v, 1891, pp. 156-218. 
23 . Goldschmidt, R.: Merogonie der Oenotherabastarde und die doppeltreziproken Bastarde von 
de Vries. Arch. f. Zellforsch., vol. ix, 1912, pp. 331-44. 
