LIST OF WOODCUTS. 



FIGURE PAGK 



1. Human egg-cell . . 122 



2. Huuian liver-cell . • 124 



3. Epithelium cell from tongue 124 



4. Thorny cells of epidermis 125 



5. Human bone-cells . 126 



6. Enamel cells of tooth . 126 



7. A mind-cell . . . 128 



8. Blood-cells in process of 



division .... 131 



9. Active lymph-cells . . 132 



10. Primitive eggs of various 



animals .... 134 



11. Mammalian egg-cell . . 136 



12. Egg-cell of Hen . . 139 



13. An Amoeba . . . 142 



14. Egg-cell of a Chalk-sponge 144 



15. Blood-cells absorbing mat- 



ter .... 145 



16. Blood-cells dividing . . 159 



17. Sperm-cells (seed-cells) . 173 



18. Fertilization of mammalian 



egg .... 175 



19. Monerula of Mammal . 179 



20. Moneron dividing . , 180 

 12. Cytula of Mammal • . 181 



FIGURE PAG E 



22. Germination of a Coral . 190 



23. Gastrulaof Gasti'ophysema 193 



24. Gastrula of Sagitta . . 193 



25. Gastrula of Uraster . . 193 



26. Gastrula of Nauplius . 193 



27. Gastrula of Limngeus . 193 



28. Gastrula of Araphioxus . 193 



29. Gastrulaof Olynthus . 195 



30. Cells of primary germ- 



layers .... 198 



31. Cleavage of Frog's egg . 203 

 32-35. Gastrulation of the Toad 206 



36. Monerula of Babbit . . 210 



37. Cytula of Babbit . . 210 



38. Babbit-egg with two cells 210 



39. Babbit-egg with four cells 212 



40. Babbit-egg with eight cells 212 



41. Gastrula of Babbit . . 213 



42. Egg of an Osseous Fish . 217 



43. Gastrulaof an Osseous Fish 219 



44. Egg-cell of Hen . . 223 



45. Egg-cleavage of Bird . 225 



46. Mulberry-germ of Chick . 228 



47. Bladder-germ of Chick . 228 



48. Invaginated germ of Chick 228 



