Contents. 



PAGE 



The universe as eject . . . . . . . . . . . . 478 



Metakinetic environment of mind . . . . . . . . 481 



Conceptual ideas not subject to natural selection . . . . . . 483 



Elimination through incongruity . . . . . . . . 486 



Interneural evolution . . . . . . . . . . . . 499 



Interpretations of nature . . . . . . . . . . 492 



Can fetishism have had a natural genesis ? . . . . . . 493 



The origin of interneural variations . . . . . . . . 496 



Are acquired variations inherited ? . . . . . . . . 497 



Summary and conclusion . . 501 



LIST OF ILLUSTRATIONS. 



FIG. PAGE 



KENTISH PLOVER WITH EGGS AND YOUNG Frontispiece 



1 . SPIRACLES AND AIR-TUBES OF COCKROACH . . . . . . 3 



2. GILLS OF MUSSEL . . . . . . . . . . 4 



3. A CELL GREATLY MAGNIFIED . . . . . . ..11 



4. AMCEBA . . . . . . . . . . . . 12 



5. EGG-CELL AND SPERM-CELL . . . . . . . . 13 



C. DIAGRAM OF CIRCULATION . . . . . . . . 23 



7. PROTOZOA . . . . . . . . . . . . 38 



8. HYDRA VIRIDES . . . . . . . . . . 43 



9. AURELIA : LIFE -CYCLE . . . . . . . . 45 



10. LIVER-FLUKE EMBRYONIC STAGES . . . . . . 47 



11. DIAGRAM OF DEVELOPMENT .. .. ..51 



12. WING OF BAT (PIPISTRELLE) .. .. .. 64- 



1 3. VARIATIONS OF THE NOCTULE . . 67 



14. LONG-EARED BAT . . . . . . 68 



15. ., PIPISTRELLE .. .. ..69 



16. ,, WHISKERED BAT . . . . . . 70 



17. VARIATIONS ADJUSTED TO THE STANDARD OF THE NOCTULE . . 73 



1 8. CATERPILLAR OF A MOTH ON AN OAK SPRAY . . . . 85 



19. LOCUST HESEMBLING A LEAF .. .. .. ..86 



20. MIMICRY OF BEES BY FLIES .. .. .. .. 91 



21. EGG AND HEN .. .. .. .. .. ..141 



22. STAG-BEETLES .. .. .. .. .. ..180 



23. TACTILE CORPUSCULES . . . . . . . . . . 247 



24. TOUCH-IIAIS OF INSECT . . 248 



