ILLUSTRATIONS
P. Chalmers (Peter Chalmers) Mitchell translation
Photograph of Élie Metchnikoff Frontispiece
Figs. Page
1. Catasetum saccatum 24
2. Herminium monorchis 26
3. Cerceris 28
4. Listera ovata 32
5. Pelopæus 34
6. Cæcum and vermiform appendage of man 44
7. Cæcum and vermiform appendage of chimpanzee 45
8. Fœtus of gibbon 46
9. Human fœtus 47
10. Fœtus of gorilla 50
11. Human fœtus 51
12. Paramecium about to divide 230
13. Conjugation of Paramecia 231
14. Section of a renal tubule invaded by Macrophags 241
15. Brain cells devoured by Macrophags 241
16. Hair becoming grey 243
17. Chætogaster about to divide 265
18. Ephemerids 271
19. Swarms of Palingenia virgo 273
20. Larva of an Ephemerid 276
THE NATURE OF MAN