LIST OF ILLUSTRATIONS. 



FIG. 



1. Cast of Trigonia longa, 



2. Microscopic section of 



the wood of a fossil 

 Conifer ............. 



3. Microscopic section of 



the wood of the Larch 



4. Section of Carbonife- 



rous strata, Kinghorn, 

 Fife ............... 



5. Diagram illustrating the 



formation of strati- 

 fied deposits ......... 



6. Microscopic section of 



a calcareous breccia.. 



7. Microscopic section of 



White Chalk ........ 



8. Organisms in Atlantic 



Ooze ............... 



9. Crinoidal marble ...... 



10. Piece of Nummulitic 



limestone, Pyramids. 



11. Microscopic section of 



Foraminif eral _ lime- 

 stone Carboniferous 

 America ............ 



12. Microscopic section of 



Lower Silarian lime- 

 stone ............... 



13. Microscopic section of 



oolitic limestone, Ju- 

 rassic .............. 



14. Microscopic section of 



oolitic limestone, car- 

 boniferous .......... 



15. Organisms in Barba- 



does earth .......... 



16. Organisms in Richmond 



earth ............... 



17. Ideal section of the 



crust of the earth... 



18. Unconformable June- 



tion of Chalk and Eo- 

 cene rocks .......... 



19. Erect trunk of a Sigil- 



laria ............... 



20. Diagrammatic section 



13 



14 



14 



16 



17 

 20 

 23 



24 



25 



26 



28 

 28 

 30 



31 



34 

 34 

 44 



50 



55 

 (xv) 



FIG. 



21. 



22. 



23- 



24. 



27. 



28. 

 29. 

 30. 

 31- 



32. 



33- 

 34- 



35- 

 36. 



39- 



40. 



41. 

 42. 

 43- 

 44- 

 45- 

 46. 

 47- 



PAGE 



of the Laurentian 

 rocks 66 



Microscopic section of 



Laurentian limestone 67 

 Fragment of a mass of 



Eozoon Canadense.. 69 

 Diagram illustrating the 



structure of EozoVn. 70 

 Microscopic section of 



Eozo'dn Canadense... 71 

 Nonionina and Gromia 72 

 Group of shells of liv- 

 ing Foraminif era .... 73 

 Diagrammatic section 



of Cambrian strata... 78 

 Eophyton Linneanum. . 81 



Oldhamia antiqua 82 



Scolithus Canadensis.. 83 

 Group of Cambrian 



Trilobites 85 



Group of characteristic 



Cambrian fossils 88 



Fragment of Dictyo- 



nema sociale 89 



Generalized section ^of 

 the Lower Silurian 



rocks of Wales 95 



Generalized section of 

 the Lower Silurian 

 rocks of North Ame- 

 rica 97 



Licrophycus Ottawaen- 



sis 98 



Astylospongia prcemorsa 99 

 Stromatopora rugosa.. loo 

 Dichograptus octobra- 



chiatus IO2 



Didymograptus diava- 



ricatus 103 



Diplograptus pristis... 103 

 Phyllograptus typus... 103 



Zaphrentis Stokesi 105 



Strombodes pentagonus 105 

 Columnaria alveolata.. 106 

 Group of Cystideans.. 107 

 Group of Lower Silu- 

 rian Crustaceans... 108 



