204 



D. H. Scott. 



pteris, probably identical with the species Ä. lonchifica, which is common, 

 in the form of impressions, at similar horizons. There is a con- 



Fig. 35. Mednllosa anglica. Transverse section of stem, with three leaf- bases 

 ( Mvdnxulon) attached. V about lVç>. 



{Myeloxylon) attached. X about 



fe?J^'^ 



Fig. 36. Mednllosa anglica. Central part of stem, showing the three steles Avith 

 their primary and secondary wood. X about 3. 



siderable probability that the Trigonocarpon originally described by 

 Hooker and Binney in 1854 and referred by Williamson to 



