[MATTHEW] FLORA OF THE LITTLE RIVER GROUP NO. II 88 



as stems of Calamités, others with longitudinal ribs may be those of 

 Sigillaria. 



It has been suggested that these stout trunks of Dadoxylon may 

 belong to Cordaites, but I think this opinion may be held in reserve, for 

 although leaves of Cordaites, chiefly C. Robhii, are found abundantly in 

 the shaly layers of these sandstones, and are very common in the Cor- 

 daite shales, both Lower and Upper, the sandstones that go with these 

 shales have so far yielded no examples of the Dadoxylon trunks, though 

 they abound with leaves of Cordaites Rohbii, Dn. 



Two New Pteridosperms. 



When the objects which together constitute the first of these two 

 species of Pteridosperms were described, it was not suspected that they 

 belonged together, nor that the fern-like form was the vegetative part of 

 a seed-bearing plant, nor that the other was the floral envelope of a fili- 

 coid plant : perhaps only a knowledge of the similar relations of foliar and 

 seminiferous parts of other forms of Palaeozoic plants that have come to 

 light in recent years, would justify the fusion of two of Sir William 

 Dawson's species, advocated herein. 



If, however, as Grand'Eury has suggested, we are to attribute to 

 Alethopteris of the Coal-measures the seeds called Pachytesta, and to 

 those of the Lower Carboniferous the fniits called Trigonocarpon, the 

 filicoid form which Sir William Dawson described must be of a different 

 genus, and the writer has therefore felt it necessary to give it a new 

 generic name, derived from the name of the city near which it is found. 



JOHANNOPHYTON n. gen. 



to include 



Alethopteris discrepans, Dn., and Annularia, or Sporangites acuminatus, 

 Dn. Plate II, Figs. 7-9 ; Plate III, Figs. 1-10. 



Alethopteris discrepans is a common plant in some beds of the 

 Lower Cordaite shales. It has heretofore been included in the Ferns, 

 but bears many indications of being a Pteridosperm. It has been in- 

 cluded in the genus Alethopteris, though it bears no indication of carry- 

 ing its fruit under the margins of the pinnules as is required by some 

 descriptions of that genus. The pinnules are thick, leathery and strong- 

 nerved, and are usually well preserved in the shale. Under Johanno- 

 phyton it may be redescribed as follows : — 



Vegetative part the plant Alethopteroid and consisting of two types 

 or forms of pinnules or leaves, one wide and closely set on the rachis, 



