LIST OF THE BRITISH 



VII. Desmarestia. 

 Frond solid, distichous, filiform, or flat. 



1. Desmarestia ligulata. 



2. „ aculeata. 



3. viridis. 



VIII. Arthrocladia. 

 Frond filiform, nodose, traversed by a jointed tube, 

 1. Arthrocladia villosa. 



IX. Sporochnus. 

 Frond filiform. Receptacles lateral, stalked. 

 1. Sporochnus pedunculatus. 



X. Carpomitra. 



Frond filiform or flat, and mid-ribbed. Root a shape- 

 less, woolly tuber. Receptacles terminal, mitriform. 



I. Carpomitra Cabrerae. 



