LIST OF ILLUSTRATIONS. 



FIG. 

 I. 

 2. 



3- 

 4- 

 5- 



6. 

 7- 



9- 

 10. 



12. 



13- 



IS- 



1 6. 



17- 



PAGE 



Cast of Trigonia longa, . 12 

 Microscopic section of the 



wood of a fossil Conifer, 1 3 

 Microscopic section of the 



wood of the Larch, . 13 

 Section of Carboniferous 



strata, Kinghorn, Fife, 1 6 

 Diagram illustrating the 



formation of stratified 

 deposits, ... 17 



Microscopic section of a 



calcareous breccia, . 19 



Microscopic section of 

 White Chalk, . . 22 



Organisms in Atlantic 



- Ooze, ... 23 

 Crinoidal marble, . . 24 

 Piece of Nummulitic lime- 

 stone, Pyramids, . 25 



Microscopic section of Fo- 

 raminiferal limestone 

 Carboniferous, Amer- 



FIG. 



1 8. 



19. 



20. 

 21. 

 22. 



23- 

 24. 



25- 

 26. 



27. 



28. 

 29- 

 30- 



3*; 



32- 

 33- 

 34- 



ica, . . - . .27 



Microscopic section of 

 Lower Silurian lime- 

 stone, . . .27 



Microscopic section of 

 oolitic limestone, Ju- 

 rassic, . . -29 



Microscopic section of 

 ooolitic limestone, Car- 

 boniferous, . . 30 35. 



Organisms in Barbadoes 



earth, . . -33 

 Organisms in Richmond 36. 



earth, . . . 33 37. 

 Ideal section of the crust 38. 



of the earth, . . 43 39. 



Unconformable junction 



of Chalk and Eocene 



rocks, ... 49 

 Erect trunk of a Sigillaria, 54 

 Diagrammatic section of 



the Laurentian rocks, 66 

 Microscopic section of 



Laurentian limestone, 67 

 Fragment of a mass of 



Eoztion Canadense, . 69 

 Diagram illustrating the 



structure of Eozoon, . 70 

 Microscopic- section of 



Eozoon Canadense, . 71 

 A T onionina and Gromia, . 72 

 Group of shells of living 



Foraminifera, . . 73 

 Diagrammatic section of 



Cambrian strata, . 78 



Eophyton Linneanum, . 81 

 Oldhauiia antiqua, . 82 



Scolithus Canadensis, . 83 

 Group of Cambrian Trilo- 



bites, ... 85 



Group of characteristic 



Cambrian fossils, . 88 

 Fragment of Dictyonema 



sociale, ... 89 

 Generalised section of the 



Lower Silurian rocks 



of Wales, ... 94 

 Generalised section of the 



Lower Silurian rocks 



of North America, . 9^ 

 Licrophycus Oltaivaensis, 97 

 A stylospongia flmmorsa, . 98 

 Stromatopora rugosa, . 99 

 Dichograptus octobrach iatus , I o I 



