LIST OF ILLUSTRATIONS 



Portrait of the Author (1916) 



Frontispiece 



PIG, 



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9. 

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Psilopliyton. [Dawson (1859)] 



Psilophyton. [Reid and Macnair (1896)] 



Psilophyton princeps, Dawson. [Dawson (1871)] 



Psilophyton princeps, Dawson. [Halle (1916)] 



Psilophyton princeps, Dawson. [Dawson (1859)] 



Psilophyton princeps, Dawson. [Halle (1916)] 



The emergences of Psilophyton and Rhynia. [Kidston and Lang 



(1917) and Halle (1916)] 

 Arthrostigma gracile, Dawson. [Kidston (1893)] 

 Arthrostigma gracile, Dawson. [Halle (1916)] 

 Thursopkyton Milleri, (Salt.). [Nathorst (1915)] 

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



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

 Piilophyton Thomsoni, Daws. [Salter (1859)] 

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

 Piilophyton (7) hostimense, (P. &B.). [Stur (1881)] 

 Pseudosporochnus KrejHi, (Stur). [Potoni6 and Bernard (1904)] 

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

 Brfiggeria norvegica, Nath. [Nathorst (1915)] 

 Barrandeina Dusliana, (Kr.). [Potonie and Bernard (1904)] 

 BarinophytonRichardsoni, (Haws.). [White (1905)] 

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

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



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

 Zosierophyllum myreionianum, Penh. [Reid and Macnair (1899)] 

 Hoslimella hosiimensis, P. & B. [Potonie and Bernard (1904)] 

 Sphenophyllum subtenerrimum, Nath. [Nathorst (1902)] 

 Hyenia sphenophylloides, Nath. [Nathorst (1915)] . 

 Pseudobornia ursina, Nath. [Nathorst (1902)] 

 Psygmophyllum Kolderupi, Nath. [Nathorst (1915)] 

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

 Archaeopieris Archeiypus, Schmalh. [Nathorst (1904)] 



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