AUSTRALASIAN ASSOC. ADV. 8C , VOL. I. 1888. 



PLATE XVII 



Effect of IMiqration from Different Centres of Origin, 



Approximate Order of the Appearance of Characteristic 

 Genera of Plants in the Upper Pal>eozoic and 

 Mesozoic Rocks in Europe and Australasia. 



As arranged by R. M. JOHNSTON, F.LS. 



middleT 



CENTRES 



-i- 



EUROPEAN Rocks. 



Australasian Rooks. 



• Schizoneura 



• Phyllotheca 



*■ Podozamites t 



• PterophyUum t 



• Salisburia 



• Gingkophyllum 



• Baiera 



• Thinnfeldia J 



• Glcssopteris 



• Schizoneura 



t Alethopteris 

 ■f Neuropteris t 

 t Odontopteris t 

 t Pecopteris t 

 t Sphenopteris J 

 t Taeniopteris 

 t Danaea 

 t Ulodendron 

 t Poacordaites 



t Lepidodendron 

 t Cordaites 

 t Lepidophloios 

 t Calamites t 



JPPER AND MIDDLE MESOZOIC. 



LOWER MESOzSlC. 



\ 

 \ V V 



\ 



\ 



■ \ 



\ \ 

 \ \ 

 \ \ 



CARBONI 



/— o- 





ferSui 



/ / 

 PR/ECARBONIFEROUS.- 



,\ 





\ 







-^ V- 



t Phyllotheca % 



\ Podozamites 



t Pterophyllam % 



t Salisburia 



t Gingkophyllum 



t Baiera X 



• Poacordaites "•. 

 t Sagenopteris Zeugophyllites 

 t Thinnfeldia ; 



Rhacophyllum \ 



• Alethopteris \ 



• Neuropteris } 



• Odontopteris 



• Pecopteris J 



• Sphenopteris \ 



• Taeniopteris \ 



• Danaea 



• Angiopteridium 

 t Macrotaeniopteris 

 t Cyclopteris 



Vertebraria 



Glossopteris 



Gangamopteris 



Rhacopteris 



Bornia 



Lepidodendron 



Cordaites 



Schizoneura 



Lepidophloios 



X 



.\nftimites X 



Archaeopteris X 

 Calamites 



LicTophycus 



t Genus first appeared in this horizon. 



* Genus derived from parents -who first made their appearance in the lower horizon 

 in the opposite hemisphere; also indicates centre 0/ origin. 



X Indicates tlie most abundant or most characteristic fortns, locally. 



