. The eggs of mammals . Fig. 5 Fig. 6 Fig. 7 Plate V. (Figs. 1 to 3 from the Journal of Anatomy; Figs. 4 to 7 from the Archives de Biologie.) Fig. 1, Line drawing of a section through an atretic foUicle of the mouse. First mitotic anaphase. Cytoplasmic division not completed—mouse. Fig. 2, Typical 4-celled ovarian ovum—water vole. Fig. 3, Typical 2-celled ovarian ovum with intact zona—water vole. Fig. 4, Early blastocyst of ovarian ovum—mouse. Fig. 5, Many-celled blastocyst in ovarian ovum—guinea pig. Fig. 6, Multinucleate blasto- cyst-like ovarian ovum—mouse. Fig. 7, Blastocyst-like ovarian o

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. The eggs of mammals . Fig. 5 Fig. 6 Fig. 7 Plate V. (Figs. 1 to 3 from the Journal of Anatomy; Figs. 4 to 7 from the Archives de Biologie.) Fig. 1, Line drawing of a section through an atretic foUicle of the mouse. First mitotic anaphase. Cytoplasmic division not completed—mouse. Fig. 2, Typical 4-celled ovarian ovum—water vole. Fig. 3, Typical 2-celled ovarian ovum with intact zona—water vole. Fig. 4, Early blastocyst of ovarian ovum—mouse. Fig. 5, Many-celled blastocyst in ovarian ovum—guinea pig. Fig. 6, Multinucleate blasto- cyst-like ovarian ovum—mouse. Fig. 7, Blastocyst-like ovarian ovum—guinea pig. 60

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