LIST OF ILLUSTRATIONS 



Portrait of the Author (1916) 



Frnnli 



FIG. 



1. Psilophyton. [Dawson (1859)J .... 



2. Psilophyton. [Reid and Macnair (1896)] 



3. Psilophyion princeps, Dawson. [Dawson (1871)J 



4. Psilophyton princeps, Dawson. [Halle (1916)] 



5. Psilophyton princeps, Dawson. [Dawson (1859)] 



6. Psilophyton princeps, Dawson. [Halle (1916)] 



7. The emergences ot Psilophyton and Rhynia. [Kidston and Lang 



(1917) and Halle (1916)] . . . , 



8. Arihrostigma gracile, Dawson. [Kidston (1893)] 



9. Arthrostigma gracile, Dawson. [Halle (1916)] 



10. Thursophyton Milleri, (Salt.). [Nathorst (1915)] 



11. Thvrsophyton Milleri, (Salt.). [Reid and Macnair (1899)] and 



T. hostimense, (P. & B.). [Potonie and Bernard (1904)] 



12. Piilophyton Thomsoni, Dp.ws. [Salter (1859)] 



13. Ptilophyton Thomsoni. Daws. [Carruthers (1873)] . 



14. Ptilophyton C^) hostimense, (P. &B.). [Stur (1881)] 



15. Pseudosporochnus Krejcii, (Stur). [Potonie and Bernard (1904)] 



16. Pseudosporochnus Krejcii, (Stur). [Potonie and Bernard (1904)] 



17. Broggeria norvegica, Nath. [Nathorst (1915)] 



18. Barrandeina Diisliana, {Kv.). [Potonie and Bernard (1904)] 



19. BarinophytonRichardsoni, {Daws.). [White (1905)] 



20. Parka decipiens, Fleni. [Don and Hickling (1917)] 



21. Lithophyllum lichenoides, (E. & S.) and Melobesia membranacea 



(Esper) Lamour. [Rabenhorst, Kryptogamen-Flora (1885)] 



22. Zosterophyllum niyreionianum, Penh. [Reid and Macnair (1899)] 



23. Ilostimella hostimensis, P. & B. [Potonie and Bernard (1904)] 



24. Sphenophyllum subfenerrimum, Nath. [Nathorst (1902)] 



25. Ilyenia sphenophylloides , Nath. [Nathorst (1915)] . 



26. Pseudobornia ursina, Nath. [Nathorst (1902)] 



27. Psygmophyllum Kolderupi, Nath. [Nathorst (1915)] 



28. Archaeopteris hibernica, (Forbes). [Carruthers (1872)] 



29. Archaeopteris Archetypus, Schmalh. [Nathorst (1904)] 



spiece 



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