74 



LIST OF THE BRITISH 



I. Stalked, involucrate, lobed favellae ; 2. Tetraspores 

 attached to the ramuli. 



1 . Spyridia filamentosa. 



LXXXIV. Griffithsia. 



Frond rose-red, filamentous. Filaments articulated 

 throughout, dichotomous. Ramuli single-tubed, often 

 whorled. Dissepiments hyaline. Fructification : — 1. 

 Roundish, gelatinous receptacles (favellae), including 

 minute granules ; 2. Tetraspores affixed to whorled 

 ramuli. 



1. 



Griffithsia equisetifolia. 



% 



„ simplicifllum. 



3. 



„ barbata. 



4. 



,, Devoniensis. 



5. 



„ corallina. 



6. 



„ secundiflora. 



7. 



„ setacea. 



LXXXV. Wkangelia. 



Frond rose-red, filamentous, jointed. Fructification : 

 — 1. Gelatinous receptacles (favellae); 2. Tetraspores 

 affixed to the ramuli, scattered. 



1. Wrangelia multifida. 



,, var. pilifera. 



