CHAPTER XIII
=PSILOTALES.= Pp. 17–29.
_Psilotum_ and _Tmesipteris_ 17–24 Fossils described by authors as being closely allied to _Psilotum_ 24–26 _Psilophyton_ 26–29
=PSILOTALES.= Pp. 17–29.
_Psilotum_ and _Tmesipteris_ 17–24 Fossils described by authors as being closely allied to _Psilotum_ 24–26 _Psilophyton_ 26–29