PLATE XVII. 



Fig. 1 Chaetophora cornu-damae. 



a, l>, c, d, e, different forms of thallus; /, thallus more 



highly magnified; g, filaments. 



" 2 Aphanochaete globosa. 



" 3 Pithophora oedogonia. 



•• i. highly magnified Pithophora oedogonia. 



