THE HALP-TJDE POOL. 61 



bearing pink tetraspores, and the favellce surrounded 

 thinly by ramuli, which protect but do not conceal 

 them. It is most frequently attached to small stones 

 or found on oyster beds. In Jersey it has been found 

 parasitic on larger Algce. 



Geippithsia Sectjndiplora. — Yery rare : resem- 

 bles Griffitlisia Setacece : filaments tufted, four to eight 

 inches in height, thicker than hogs' bristles, not sen- 

 sibly attenuated upwards, but with blunt points, and 

 frequently with short, horizontal, root-like ramuli 

 growing from the lower part of the branches. Eound 

 in Sark and off the coast near Plymouth. 



Geippithsia Devoxiexsis. — A small, slender 

 variety, rarely found except on the coast of Devon. 

 Colour, fine rosy red. Dense tufts are met with on 

 muddy sea shores in deep water. 



WKAKGELIA. 



(Xamed in honour of Babox vox Wkangel, a Swedish naturalist.) 



This is allied to Griffitlisia Fquisetifolia, and has a 

 considerable range, being found in deep shady mid-tide 

 pools, but grows also from perpendicular rocks at low- 

 water mark on all our coasts. 



Generic character. — Frond purplish or rosy red, 

 thread-like, jointed, the filaments single tubed. 



'Fructification. — Tetraspores white, roundish, seated 

 on ramuli or lesser branches. Favellce are composed 



