New Plants from the Erian and Carboniferous. 2*7 



1. Sigillarise and Calamodendrex. 



Favularia, (in part) ? 

 Sigillaria proper, (in part)? 

 Calamodendron, (in part) ? 



2. Cycadese. 



Rhiptozamites. 1 



3. Nceggerathiee. 



Noeggerathia. 



Poroxylon. 



Dolerophyllum. 



Whittleseya. 



Saportea. 



Medullosa? 



Colpoxylon ? 



Ptychoxylon. 



4. Cordaitese. 



5. Taxinese. 



Dictyocordaites. 

 Cordaites. 

 Dorycordaites. 

 Poacordaites. 



Psygmophyllum. 

 Baiera ? 1 

 Ginkgophyllum. 

 Tylodendron. 

 Walchia, Volteia, etc. 

 Dadoxylon. 



6. Conifers. 



It would thus appear : 



1. That the nearest structural affinities of the Pakeozoic 

 gymnosperms with the higher Cryptogams lead toward all 

 the groups of Acrogens, viz. : Sigillarise, Calamitese, Lepi- 

 dodendrese and Ferns. 



2. That the present dominant groups of Coniferas proper 

 and Cycadacese are absent or slenderly represented in the 

 Paleozoic. 



3. That the dominant Palaeozoic families are the Ncegge- 

 rathise, Cordaitese and Taxinese, and that these occupied 

 a prominent and important place, and culminated in the 

 Palseozoic and early Mesozoic periods. 



1 Permian of Russia, Schmalhausen. 



