198 BRITISH SEA-WEEDS. \Il]iocJospermc(J!. 



is a very good figure of Ceraminm (liajjJiamwi, natural size. 

 On the right there is a magnified figure of a joint with 

 whorled imbedded tetraspores. On the left,, an involucrated 

 favella, magnified.) 



Hab. On rocks and sea-weeds. Winter and summer. 

 Common. 



This is a handsome phmt, and much admired on account 

 of the beauty and regularity of its jointings. It is a smaller 

 and slenderer plant than the preceding ; differing from it 

 chiefly in having the joints colourless^ and the dissepiments 

 darkly coloured. The capsules are near the tips of the 

 branches. It is a variable plant, like the former. Its most 

 beautiful state is when the joints are a fine rose-red, and the 

 dissepiments pure white. 



3. Ceramium ciltatum, Ducluz. 

 Ilab. Ptocks and corallines in the sea. 



Tliis may be distinguished from Cer. diajphannm by its 

 greater rigidity ; by the whorls of j^ricklcs with which the 

 joints are furnished, and by the apices being very involute. 

 The finest specimens I have are from TingaFs Cave, in the 

 Island of Stafla. Very good specimens have been found on 

 mud-covered rocks at Saltcoats, opposite the Free Church. 



4. Ceramium acantiionotum, Carm. (Plate X. fig. 38, 



