Chapter VIII. The Dawn-Animal as a Teacher in Science 207

Appendix 235

Index 237

LIST OF ILLUSTRATIONS.

FULL PAGE ILLUSTRATIONS. TO FACE PAGE

I. Cape Trinity, from a Photograph (_Frontispiece_).

II. Map of the Laurentian Region on the River Ottawa 7

III. Weathered Specimen of Eozoon, from a Photograph 35

IV. Restoration of Eozoon 59

V. Nature-print of Eozoon 93

VI. Canals of Eozoon, Magnified, from Photographs 127

VII. Nature-print of Large Laminated Specimen 169

VIII. Eozoon With Chrysotile, etc. 207

WOODCUTS.

FIG. PAGE

1. General Section 9 2. Laurentian Hills 11 3. Section of Laurentian 13 4. Laurentian Map 16 5. Section at St. Pierre 22 6. Sketch of Rocks at St. Pierre 22 7. Eozoon from Burgess 36 8, 9. Eozoon from Calumet 39 10. Canals of Eozoon 41 11. Nummuline Wall 43 12. Amœba 60 13. Actinophrys 60 14. Entosolenia 62 15. Biloculina 62 16. Polystomella 62 17. Polymorphina 63 18. Archæospherinæ 67 19. Nummulites 73 20. Calcarina 73 21. Foraminiferal Rock-builders 75 21_a_. Casts of Cells of Eozoon 92 22. Modes of Mineralization 96 23. Silurian Organic Limestone 98 24. Wall of Eozoon Penetrated with Canals 98 25. Crinoid Infiltrated with Silicate 103 26. Shell Infiltrated with Silicate 104 27. Diagram of Proper Wall, etc. 106 28, 29. Casts of Canals 107 30. Eozoon from Tudor 111 31. Acervuline Variety of Eozoon 135 32, 33, 34. Archæospherinæ 137, 138 35. Annelid Burrows 140 36. Archæospherinæ 148 37. Eozoon Bavaricum 149 38, 39, 40. Archæocyathus 152, 153 41. Archæocyathus (Structure of) 154 42. Stromatopora 157 43. Stromatopora (Structure of) 158 44. Caunopora 159 45. Cœnostroma 160 46. Receptaculites 162 47, 48. Receptaculites (Structure of) 163 49. Laminæ of Eozoon 176

THE DAWN OF LIFE.