Ceramiece.'] callith amnion. 177 



say that those few specimens I have gathered in a fresh 

 state from the rock had not the lovely colour here spoken 

 of; but I think I have seen specimens from other localities 

 which were beautiful even when dried. 



4. Callith AMNION Brodi^i, Harvey. 



Hab. On other Algse ; rare. Found at Forres by Mr. 

 Brodie,, of Brodie ; Torquay by Mrs. Griffiths, Miss Cutler, 

 and Mrs. Gulson ; Cornv/all by Mr. Ealfs j and by us at 

 Saltcoats, though rarely. 



Colour a brownish -red. The general outline of the frond 

 is ovate, bearing a resemblance to the following. 



5. Callithamnion Hookeri, AgardJi. 



Hab. On rocks and Algse in the sea. Annual. Spring 

 and summer. It is one of the most common on the Ayrshire 

 coast, growing on coarse Algae, and also on sand-covered 

 rocks. It is found in great beauty on rocks in Arran. 



It is from 1-3 inches high; colour brownish-red; 

 branches spreading; a j5ne plant when the specimen is 

 good. 



6. Callithamnion tetricum, Agarclh. (Plate YII. fig. 25, 

 a portion of the frond, natural size ; and on the left, a plu- 

 mule with a favella, and under it a plumule with tetraspores, 

 both magnified.) 



N 



