PLATE V. 



A. Sporochnus, page -25. 



Fig. 1, S. pedHHCulalus ; the natural size. 2, recep- 

 tacles. 3, spores and filaments from the same. 4, 

 one of the fibres of the crest. 5, cross section of 

 the stem ; all maijnijied. 



B. Carpomitea, page 25. 



Fig. 1, C Cahreroi ; the natural size. 2, portion of 

 the frond, with a fertile branch. 3, receptacle. 4, 

 filament from the same. 5, cross section of the 

 frond ; magnified. 



C. Arthrocladia, page 24. 



Fig. 1, branch of A. rillosa ; the natural size. 2, 

 small part of the frond. 3, pods, containing spores. 

 4, longitudinal section of the frond. 5, cross section 

 of the same ; all magnified. 



D. Desmarestia, page 23. 



Fig. 1, branch of D. aculeata ; the natural size. 2, 

 longitudinal, and 3, cross, sections of the stem, mag- 

 nified, i, branch of D. ligulata, the natural size. 



