108 The Lower Cretaceous Floras of the World 



Onychiopsis Mantelli (Brongn.) 



Onychiopsis elongata (Geyler) 



Otozamites Gceppertianus (Dunk.) 



Otosamites Klipsteinii (Dunk.) 



Otozamites Klipsteinii superbus Sew. 



Otozamites Klipsteinii longifolius Sew. 



Otozamites sp., cf. 0. Reibeiroanus Heer 



Pagiophylliim crassifolium (Schenk) 



Pagiophyllum sp. 



Pinites Carruthersi Gard. 



Pinites Dunkeri Carr. 



Pinites Ruffordi Sew. 



Pinites Solm^sii Sew. 



Protopteris Witteana Schenk 



Ruffordia Gopperti (Dunk.) 



Ruffordia Gopperti var. latifolia Sew. 



Sagenopteris acutifolia Sew. 



Sagenopteris Mantelli (Dunk.) Schenk 



Sphenolepis Kurriana (Dunk.) Schenk 



Sphenolepis Sternbergiana (Dunk.) Schenk 



cf. Sphenolepidium. (BequoiaJ subulatum Heer 



Sphenolepidium, sp. 



Sphenopteris Fittoni Sew. 



Sphenopteris Fontainei Sew. 



Twniopteris Beyrichii (Schenk) 



Twniopteris Beyrichii var. superba Sew. 



Tceniopteris Dawsoni Sew. 



Tempskya Schimperi Corda 



Thuites valdensis Sew. 



Weichselia reticulata (S. & W.) Ward 



Withamia Saportcc Sew. 



Yatesia Morrisii Carr. 



Zamites Buchianus (Ett.) 



Zamites Carruthersi Sew.- - 



Zamites Carruthersi var. latifolius Sew. 



These include 2 algse, 1 cliara, 1 bryophyte, 3 equiseta, 33 ferns, 16 

 conifers, and 24 cycadophytes. Twelve of the widespread species are 

 present in the Potomac flora. There are 16 common genera represented 

 in the two areas and a number of distinct, but closely related species in 

 the two floras. 



Belgium 



Dumont divided the Aachenian of Hainaut into an upper and a lower 

 stage, but in recent years Belgian geologists have restricted Dumoht^^s 



