LIST OF ILLUSTKATIONS. 



FIG. 1. The Lancelot (Branchiostoma lanceolatum) ... ... ... 13 



FIG. 2. Haddock ( Gadus cBglefinus] ; and Tub-fishes (Trigla hirundo)... 15 



FIG. 3. The African Mud-jumper (Periophthalmus hoelreuteri) 18 



FIG. 4. Evolution of the Extremities face 20 



FIG. 5. Skeletons of the Anterior Extremities of various Vertebrates ... 21 



FIG. 6. Flying-foxes (Pteropus edulis) 25 



FIG. 7. Skeleton of the Anterior Extremities of the Bat and the Flying 



Saurian Pterodactylus ... , ... ... ... ... ... 26 



FIG. 8. Amoeba Umax at different Temperatures 32 



FIG. 9. Neoscopelus macro lepidotus... ... ... ... ... ... 35 



FIG. 10. Bear-animalcules (Macrobiotus Imfelandi) ... ... ... 38 



FIG. 11. The Mud-fish (Protopterus annectens) 39 



FIG. 12. Fowl in a State of Cataplexy 44 



FIG. 13. Crayfish in a State of Cataplexy 45 



FIG. 14. Longitudinal Section of a Thighbone ... ... ... ... 52 



FIG. 15. Struggle of the Germ-cells in the Male Glands of a Cuttle-fish 



(Rossia macrosoma) ... ... ... ... ... ... 55 



FIG. 16. Anthozoa ... ... ... face 61 



FIG. 17. Fresh-water Polyp (H ydra viridis) 63 



FIG. 18. Symbiosis of Sea-anemone and Unicellular Algae ... ... 64 



FIG. 19. Venus's Fly-trap (Dionceamuscipula] ... .;.,'... ... 66 



FIG. 20. Structure of a Cell 71 



FIG. 21. Leucocytes of the Frog devouring a Bacillus 73 



FIG. 22. Cells-forms 78 



FIG. 23. Mitosis face 80 



FIG. 24. Bathybius HaecUi .... 98 



FIG. 25. Trilobites 105 



FIG. 26. Shells of Extinct Cephalopoda 107 



FIG. 27. Archaeopteryx face 110 



FIG. 28. Peripatus capensis Ill 



FIG. 29. Development of the Foot of the Horse 113 



FIG. 30. Tooth-development of the Horse 114 



FIG. 31. Ova of Different Animals 116 



FIG. 32. Embryos of Vertebrates 118 



FIG. 33. Amblystoma tigrinum ... ... ... ... ... ... 121 



FIG. 34. Shifting of the Eyes during the Development of a Young 



Flat-fish 123 



FIG. 35. The Common Eorqual (Balcenoptera musculus) 124 



FIG. 36. Rudimentary Organs face 126 



FIG. 37. Echinodermata ,, 128 



FIG. 38. Water- vascular System of a Starfish ... 129 



FIG. 39. Larv* of Echinodermata 130 



