long, rosy, patent or squarrose, dichotomous, taper-pointed, their articula- 

 tions 4-6 times longer than broad, cylindrical. Sticlddia linear, acuminate, 

 many times longer than broad, borne by the ramelli. Ceramidla unknown. 

 Colour of the stem and branches a dull red or red-brown ; of the ramelli 

 rosy. Substance rather firm, not soon decomposing in fresh-water, and not 

 in the least gelatinous. In drying the frond adheres firmly to paper. 



This species is named in compliment to Mrs. Fereday, of 

 Georgetown, in whose collection I first saw some fine specimens. 

 Subsequently I collected it in considerable plenty in the Tamar, 

 above Georgetown, where it is occasionally drifted ashore in 

 large quantity. 



It is most allied, perhaps, to B. villosa, some forms of which 

 it somewhat resembles, but is of much firmer and less gelatinous 

 texture, bears exposure to fresh-water for a much longer period ; 

 has shorter and less attenuated ramelli, and is more decom- 

 poundly branched. 



Kg. 1. Dasya Fereday^, — the natural size. 2. Section of the stem. 3. Ea- 

 mulus. 4. Ramellus, with stichidia. 5. A stichidium. 6. A tetraspore: 

 — variously magnified. 



