LOW- WATER MAE£. 8/ 



abundantly on the coast of England and in the Chan- 

 nel Islands. 



Callithamxio^ Teteicum. — This is one of the 

 largest and coarsest species. Colour, a very dark, dull 

 brownish-red. It grows abundantly on the face of 

 perpendicular rocks facing the sea at low-water mark, 

 or even half-tide level in deep pools. The tetraspores 

 are minute, sessile, and on very short pinna. ?; the fa- 

 vellcB are double on irregular branches. This grows 

 in dense tufts from four to eight inches long, all round 

 the south coast of England, the west of Ireland, and 

 in the Channel Islands. 



CALLiTnAMXio^" Kosettm. — A beautiful small spe- 

 cies, growing on other seaweed, frequently in estuaries 

 or muddy places, which Callitli amnions prefer. Favellcd 

 at the ends of the branches, and often in considerable 

 groups ; tetraspores, one on each joint of the lower 

 end of the branches. 



Callithamxiox Coeymbosttm. — Though small, 

 this plant may be readily recognized, on floating it 

 out, by the level top of its branches. The colour is 

 rosy-red; it is very slender and hair-like, soft, and 

 adhering closely to paper. JSTot uncommon on other 

 seaweed at low water. 



Callttha^ixio^ Eloeidultjm. — A young marine 

 botanist would hardly guess at this plant, but pass it 

 by a thousand times, it is so plentiful and so insig- 

 nificant and utterly graceless on paper. On all rocks 



