FIGURE 1.1. THE HUMAN OVUM.

FIGURE 1.2. STEM-CELL OF AN ECHINODERM.

FIGURE 1.3. THREE EPITHELIAL CELLS.

FIGURE 1.4. FIVE SPINY OR GROOVED CELLS.

FIGURE 1.5. TEN LIVER-CELLS.

FIGURE 1.6. NINE STAR-SHAPED BONE-CELLS.

FIGURE 1.7. ELEVEN STAR-SHAPED CELLS.

FIGURE 1.8. UNFERTILISED OVUM OF AN ECHINODERM.

FIGURE 1.9. A LARGE BRANCHING NERVE-CELL.

FIGURE 1.10. BLOOD-CELLS.

FIGURE 1.11. INDIRECT OR MITOTIC CELL-DIVISION.

FIGURE 1.12. MOBILE CELLS.

FIGURE 1.13. OVA OF VARIOUS ANIMALS.

FIGURE 1.14. THE HUMAN OVUM.

FIGURE 1.15. FERTILISED OVUM OF HEN.