THE MARINE BOTANIST. 



249 



those of the branches five or six times as long as 

 broad, those of the ramuli very short ; dissepiments 

 opaque, purple ; favellae borne on the lateral ramuli 

 with a spreading many-rayed involucre. 



(7. gracillimum has a softer and more gelatinous 

 substance than any British Cerammmy and this 

 character, with its extreme tenuity, and the minute, 

 fastigiate lateral branchlets, readily distinguish it 

 from any of the section to which it belongs. So 

 slender are its threads, so flaccid, and so densely 

 crowded together, that it is almost impossible to 

 display them properly on paper. They almost 

 invariably become entangled together, and it is in 

 vain to attempt their disentanglement. Harv. 

 Phyc, Brit, Grows on Corallina officinalis, and 

 other algse. Sometimes attached to mussel-shells 

 near extreme low water-mark. Annual. Septem- 

 ber. Kilkee, "covering a very large surface of 

 rock, growing on the stunted fronds of C. offici- 

 nalisr — Dr. W. H. Harvey. Plymouth. Pen- 

 zance. " Probably common." 



