100 



INDEX 



Pterygotus, 4 



Piilophyion, 9, 17, 31 (Fig. 12), 32 



(Fig. 13), 33 (Fig. 14), 35, 37, 



50, 78, 81 

 Ptilophyton hostimense. 33 (Fig. 14) 

 P. Thomsoni, 10, 31 (Fig. 12), 32 



(Fig. 13) 



Reid, J., 29 



Rhacophyllum, 84 



Rhacopteris, 9, 11, 61 (Fig. 33), 69, 



79 (Fig. 42), 81, 84 

 Rhacopteris furcillata, 61 (Fig. 33) 

 R. paniculifera, 79 (Fig. 42) 

 Rhizocarps (Hydropterideae), 39, 46 

 Rhynia, 3, 15, 16, 20, 24, 25 (Fig. 



7), 26, 44, 46 . 

 Rhynia Gwynne-V aughani, 1, 2, 22- 



25 (Fig. 7), 26 

 Rhynie, Aberdeenshire, 5 

 Roragen, 6, 7, 12, 43, 44 

 Russia, 4, 6, 7, 12, 67, 68, 91 



Schimper, W. P., 11 



Scotland, 3, 5, 7, 10, 11, 14, 16, 26, 



29, 38, 42, 91 

 Scott, D. H., 72 



Sedgwick Museum, Cambridge, 76 

 Selaginella, 86 

 Sigillaria, 48, 69, 86 

 SUurian, 5, 8, 16, 38, 75, 89 

 Spermophyta, 71 



Sphenophyllales, 71, 77, 86, 87, 88 

 Sphenophyllum, 9, 12, 52 (Fig. 24), 



54, 76, 77 

 Sphenophyllum Dawsoni, 77 

 S. subtenerrimum, 52 (Fig. 24) 

 Sphenopsida, 9, 10, 52-56, 65, 71, 



72, 74-77, 86, 87 

 Sphenopteridium, 9, 10, 12, 13, 61 



(Fig. 34), 62 (Fig. 33), 81 (Fig. 



44), 88 

 Sphenopteridium condrusorum, 11 

 S. moramcum, 81 (Fig. 44) 

 S. rigidum, 11, 61 (Fig. 34), 62 

 Sphenopterids, 84 

 Sphenopieris, 9, 11. 12, 13, 64, 79, 



81, 82 (Figs. 45 and 46) 

 Sphenopieris affinis, 81, 82 (Fig. 45) 



S. bifida, 81, 82 (Fig. 46) 



S. densepinnata, 11 



S. Hookeri, 11 



"Spines" on axis of Psilophyton, 



18-26 

 Spiropteris, 12, 35 

 Spitzbergen, 6, 7, 12, 56, 67 

 Sporochnus, 50 

 Sporogonites, 12, 44, 45, 71 

 Stele, comparison of that of Psilo- 



tales with that of Psilophyton, 



88 ; origin of in the earlier 



Cormophyta, 89-91 

 Sternberg, C. von, 68 

 Stigmaria, 12, 64, 90 

 Stringocephalus Burtini, 5 

 Stur, D., 37, 51 

 Sykes (Thoday), M. G., 86 



Taeniocrada, 9, 42, 47 

 Telangium, 11 

 Thoday (Sykes), M. G., 86 

 Thursophyton, 9, 10, 12, 28 (Fig. 



10), 29, 30 (Fig. 11), 31, 50, 



51, 85, 86 

 Thursophyton Milleri, 10, 28 (Fig. 



10), 29, 30 (Fig. 11), 31 

 T. Reidi, 10, 29, 30 

 Tmesipteris, 49, 87, 88 

 Triphyllopteris, 11 



Unger, F., 69 



United States, 2, 6, 7, 13, 16, 37, 



38, 42, 56, 67, 91 

 Unknown genera in Devonian rocks, 



69 



Victoria, 6, 13 



White' D., 2, 37, 42, 47, 66, 67, 



68 

 Wood, Petrified, 13, 91 



Xenotheca, 11, 67 



Zosterophyllum, 50, 85 

 Zosterophyllum myretonianum, 1 1 , 

 41 (Fig. 22), 42 



CAMBBIDGE: PEINTBII BY J. B. PEACE, M.A., AT THE UNIVEBSITY PRESS 



