1. Extra embryo sacs are frequently formed. 2. The cross-wall between the two daughter nuclei, which are formed by the first division of the endosperm nuleus, is usually present, although so delicate that it is very difficult to demonstrate. 3. The nucleus in the micropylar end of the sac forms the endosperm. 4. The nucellar tube is somewhat different in the different species, and also subject to great variation, especially within the genus Castalia. 5. The embryo of Nymphaea originates without a suspensor and later develops a latent suspensor; the embryo of Castalia originates either without or with a filamentous suspensor; the embryos of Cabomba and Brasenia with short filamentous suspensors; and the embryo of Nelumbo either with or without the very short latent suspensor.