274 THE MARINE BOTANIST. 



C. testragonum. See description. 



C, hrachiatum. Ditto. 



C, tetriciim. Grows in tide-pools on other 

 algae, or more frequently on perpendicular faces of 

 rock, at half-tide level. Perennial. Common on 

 the rocky coasts of England, and the west and 

 south of England. Abundant at Swansea. Some- 

 times cast ashore at Minehead, Somerset, I. G. 

 Falmouth, '^ not very frequent," Miss Warren. 

 Channel Islands. Lambay. Fronds two to eight 

 inches long, rigid, with straight pinnated ramuli. 

 Colour a dull dark-brown red. Substance harsh, 

 scarcely adhering to paper. 



C. Hooheri. Grows on rocks and algae between 

 tide-marks, and at a greater depth. Dispersed 

 along the British shores from Orkney to Cornwall, 

 and in Ireland. Not uncommon. Annual. Spring 

 and summer. From one to three inches high y stem 

 opaque, bristle-like, simple \ branches flexuous, with 

 patent or divaricated ramuli. Colour a brownish 

 or rosy-red. " Specimens from North Devon and the 

 south of Ireland are much more robust and deep 



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