LIST OF ILLUSTRATIONS. 



FIG. P 



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 



Foraminiferal 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 j unc- 



tion of Chalk and Eo- 

 cene rocks 



19. Erect trunk of a Sigil- 



laria 



20. Diagrammatic section 



PACK 



of the Laurentian 

 rocks 66 



Microscopic section of 



Laurentian limestone 67 

 Fragment of a mass of 



Eozoon Canadense.. 69 

 Diagram illustrating the 



structure of Eozo'dn. 7 

 Microscopic section of 



Eozo'dn Canadense... 71 

 Nonionina and Gromia 72 

 Group of shells of liv- 

 ing Foraminifera .... 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 pramorsa 99 

 Stromatopora rugosa.. 100 

 Dichograptus octobra- 



c hiatus 102 



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 



(xv) 



