LIST OF WOODCUTS. 



-•c*- 



FTGJBB PAGR 



1. Human egg-cell • . 122 



2. Human liver-cell • . 124 



3. Epithelium cell from tongue 124 



4. Thorny cells of epidermis 125 



FIGURE PAGE 



22. Germination of a Coral , 190 



23. Gastrulaof Gastrophysema 193 



24. Gastrula of Sagitta . . 193 



25. Gastrula of Uraster . . 193 



26. Gastrula of Nauplius . 193 



27. Gastrula of Limnseus . 193 



28. Gastrula of Amphioxus . 193 



29. Gastrula of 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 Rabbit . . 210 



37. Cytula of Eabbit . . 210 



38. Eabbit-egg with two cells 210 



39. Eabbit-egg with four cells 212 



40. Eabbit-egg with eight cells 212 



41. Gastrula of Eabbit . , 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 



