THE MARINE BOTANIST. 123 



bright scarlet on exposure to the atmosphere. 

 Grows on rocks and algse near low water-mark. 

 The var. squarrosa more slender in its branching, 

 and without hair-like fibres, grows in from four 

 to fifteen fathoms water. Annual Summer — 

 being frequent on all our shores. 



0. S. D, ocellata. Grows on mud-covered 

 rocks near low water-mark, rare, very fine at 

 Exmouth, Mrs. Gulson. Abundant on the pier 

 at Torquay. Trevol, near Plymouth. Whitsand 

 Bay, ditto. St. Michael's Mount, and Mousehole, 

 near Penzance. Wicklow. Balbriggan. Smer- 

 wick Harbour, Orkney. A much smaller species 

 than the foregoing, from one to two inches in 

 height, tufted, and thickly set with upright, 

 spreading, forked ramuli, which are particularly 

 dense towards the tips of the branches. The 

 colour is a brownish or bright purple. 



D, arhuscida. Grows on rocks at the verge of 

 low water-mark. Rare in England; not uncom- 

 mon on the shores of Ireland and Scotland. 

 Salcombe, Devon. Mewstone, Plymouth. Fal- 



