116 The Lower Cretaceous Floras of the World 



Macrotcnnioptcris (?) marginata Nathorst (probably a Nilsonia) 



Nilsonia Johnstrupi Heer 



Nilsonia schaumburgensis (Dunker) 



Nilsonia pterophylloides Yokoyama 



Onychiopsis elongata (Geyler) Yokoyama 



Onychiopsis elegans Yokoyama 



Pecopteris cf. virginiensis Fontaine ^ 



Podozamites lanceolatus minor Heer 



Podozamites lanceolatus latifolia Nathorst 



Podozamites pusillus Velenovsky 



Podozamites sp., Yokoyama 



Pteris (?) sp., Yokoyama 



Ptilophyllum cf. cutchense Morris 



Sphenopteris tenuicula Yokoyama 



Thyrsopteris sp., Yokoyama 



Torreya venusta Yokoyama 



Zamiophyllum Naumanni Nathorst 



The list embraces 1 lycopod, 12 ferns, 13 cycads, and but 2 conifers. 

 Five of the species are present in the Potomac flora, and there are three 

 or four additional species in the Japanese flora which are closely related 

 to American forms. 



China 



From the Mesozoic basin in the province of Ssu-ch'nan in southwestern 



China, Professor Yokoyama " has reported a Lower Cretaceous flora which 



he regards as of JSTeocomian age. The forms recognized are: 



CladophleMs sp., Yokoyama 

 Goniopteris nitidula Yokoyama 

 Glossozamites acuminatus Yokoyama 

 Glossozamites Hoheneggeri (Schenk) 

 Podozamites lanceolatus (L. & H.) Schimper 



8'pitzhergen 

 The Mesozoic flora of Spitzbergen has been revised recently by 

 IsTathorst.' Although the plants from Cape Staratschin, discovered by 

 ISTordenskiold in 1872, were regarded by Heer as of Lower Cretaceous 



^ This form should probably be included in CladophleMs Browniana. 



^Yokoyama, Mesozoic Plants from China, Journ. Coll. Sci., Imp. Univ., vol. 

 xxi, 1906. 



^Nathorst, Zur Mesozoischen Flora Spitzbergens, Kgl. Svenska Vetens.- 

 Akad. Handl., Band xxx, No. 1, 1897. 



