( 142 ) 



gathered somewhat crisp, soon becoming flaccid," closely adhering to 

 paper. Colom-, " a clear pinky red " when newly gathered, but rapidly 

 changing in fresh water and in diying to a dull yellowish brown, and 

 communicating the same colour to the paper. 



At one time considered one of the rarest of our British Algfe, the 

 present species has been found of late years in many difl:erent localities, 

 especially on om- southern shores, and extends its range to the west of 

 Scotland, and even to Orkney {Phi/c. Brit), but in the latter countries it 

 seems to be rare, and has not been found, so far as we are aware, on the 

 east coast. 



In the structure of its fronds it scarcely differs from some of the 

 pellucid-jointed species of Callithamnion, with which it has till lately, and 

 perhaps without any great inconvenience or impropriety, been arranged. 



When the true nature of the fructification is better known, the affini- 

 ties of the species may be more satisfactorily determined, and we think 

 it not impossible but that, should the genus Callithamnion remain entire, 

 as at present, it may again become associated with its former congeners. 

 Should the fruit prove to be identical with that of Callithamnion, the 

 minor differences of habit would scarcely be sufficient to keep them 

 apart. 



EXPLANATION OF PLATE CXVI. 



Pig. 1. — Corynospora pedix^ellata, natural size. 

 2. — Brancblet with tetraspores, magnified. 

 3. — The same, more highly magnified. 



