PLATE VIII. 



A. STRIARIA, page 41. 



Fig. 1 , S. attenuata ; the natural size. 2, small por- 

 tion of the frond, with sori in transverse rows. 8, a 

 sorus on a fragment of the frond. 4, a spore ; all 

 magnified. 



B. PUNCTARIA, page 41. 



Fig. 1, P. plantaginea ; the natural size. 2, small 

 portions of the frond with scattered spores. 3, small 

 portions with a sorus. 4, section of frond through 

 the centre of a sorus. 5, spores ; all magnified. 



C. ASPEROCOCCUS, page 42. 



Fig* 1, A. Turneri ; the natural size. 2, small por- 

 tion of the surface with sori. 3, section of frond and 

 sorus. 4, spore ; all magnified. 



D. LITOSIPHON, page 43. 



Fig. 1, Tuft of L. pusillus; the natural size. 2, por- 

 tion of a frond, clothed with hairs. 3, small portion 

 of the same with spores. 4, 5, cross sections of the 

 frond ; all magnified. 



