1 



PLATE XX. 



Heterangium Hibernicum, sp. nov. 



Fig. 



1. Eeproduction of photograph (somewhat reduced) of the impression of 



Heterangium hibernicum. (See fig. 1, p. 250.) 



2. A branching piece of a rachis, showing, just below the arrow, the 



seed impression. (See also figs. 2 and 3, p. 251.) 



3. Enlarged reproduction of part of fig. 2, showing the seed, the position 



of which is indicated by the arrow. 



