20 

 MEGAPHYTON FRONDOSUM. 



FRONDOSE MEGAPHYTON. 



Generic Character. 



Stem arborescent, simple, furrowed longitudinally; cicatrices in the furrow 

 between the ridges. 



•&* 



Specific Character. 



MEGAPHYTONfrondosum. Cicatrices near together, horse-shoe shaped with 

 the points upwards, filling the furrow. 



Synonyms. 

 This fossil plant has not been described or figured by any preceding author. 



Description and Locality. 



Stem arborescent, simple, furrowed longitudinally, surface coarsely fibrous. 



Ridges rounded, large. 



Furrows few, wide, flattish. 



Cicatrices in the furrow, near together, horse-shoe shape with the points up- 

 wards, nearly filling the furrow, gland-bearing. 



Glands numerous, irregular, ovate or linear. 



Found imbedded obliquely in the sandstone of a quarry near Rowmarsh, in 

 Yorkshire. 



Observations. 



The reticulated fibrous appearance of the surface of the stem, and the charac- 

 ters of the glands, very much resemble those of some of the tree-ferns of tropical 

 countries ; there are however other characters which seem to oppose this determi- 

 nation. 



The figure represents part of a specimen about ten feet in length. 



