Plate XL 



Alaria escidentu Grey. 



Fig. 1. Frond iu uatimil size, Avitli the up])ei' part of tlio blade eut off. 

 The metasorie character of the s])orophylls is not satisfactorily^ 

 slio^\u in this figure. Tlie gTadual morphological changes of 

 the spoiophvlls as they becc)nie soriferous are essentially similar 

 to those .shown in Plate X for A. crassifo'ia K-JELLM. 



Fig. 2. Cross section of the midrib of a young plant, x 5. 



Fig. H. Cross section of the midril) of a well-grown i^lant. x 5. 



