Plate VI. 



Fig. 21. SPOEOCHNUS PEDUNCULATUS. 



Colour. When fresh, olive brown; on exposure^ jellow-green; its tufts when 

 present,, bright green. 



Siibstai'icG. Membranaceous; soft; delicate. 



Character of Frond. A thread-like, long, simple stem, with long, slender, 

 simple branches on each side. The whole frond crowded with very 

 small, stalked receptacles. 



Moasitrement. From 6 to 18 inches long. 



Fribdification. Minute seeds [sijores] in very small, stalked receptacles, borne 

 on the branches; each tipped with a crest of the finest, hair-like, 

 bright green filaments, which fall off as the plant advances in age. 



Habiytat. Eastern and southern shores of England and Ireland; not very 

 uncommon. Frith of Forth, Bridlington, Isle of Man, Portrane, &c. 



Fig. 22. CAEPOMITRA CABRERA. 



Colour. Delicate olive-green. 



Substance. When fresh, firm; rather gristly. 



Character of Frond. Very narrow; flat; obscurely midribbed; branched. 

 Branching forked (dicliotomous) , but not quite regularly so. Occa- 

 sionally contracted as if drawn in. Root woolly. 



Measurement. From 6 to 8 inches long. 



Frnctijication. Minute seeds {sjiores) in special receptacles at the tips of the 

 branches. 



Habitat. South of England. Plymouth Sound. Ireland, Youglial, Co. Cork. 

 Yery rare. Thrown up from deep water. 



The receptacles are called mitre-shaped, but the resemblance is not startling. 



11 



