1/tet of Jllusttations 



FIG. PAGE 



I. DIAGRAMS ILLUSTRATING KARYOKINESIS . . 14 



II. DIAGRAM ILLUSTRATING THE MATURATION OF THE OVUM . i 5 



III. VARIOUS STAGES IN THE SEGMENTATION OF THE OVUM . 1 5 



IV. PANDORINA MORUM . . . . .16 

 V. GASTRULA . . . . . .16 



VI. EMBRYONIC AREA OF A SEVEN DAYS' EMBRYO RABBIT . 17 



VII. HUMAN EMBRYO . . . . . .18 



VIII. HYDRA . . . . . . .25 



IX. PRIMARY WING FEATHER . . . .62 



X. TRUNK OF (A) AFRICAN, (B) INDIAN ELEPHANT . . 79 



XI. MOSAIC FORMED BY LEAVES OF HORNBEAM . . 83 



XII. A. NAUPLIUS OF SACCULINA, ETC. . . . -91 



B. SACCULINA . . . . . -91 



XIII. BALANUS (SESSILE BARNACLE) . . . .92 



XIV. GENEALOGICAL TREE . . . . -139 



