A.LGM. 



213 



Fig. 122. Dasya Kut- 

 zingiana. 



or greenish ; Chondrus crispus changes 

 colour in a similar way. 



Dasya coccinea, the hairy sea-weed, 

 is so called from the filamentous or 

 feathery appearance of its branches ; 

 when of a fine colour it is one of the 

 handsomest of the British species. 



The Dasya Kutzingiana, fig. 122, repre- 

 sents an Italian species, bearing a seed- 

 vessel with two rows of tetraspores ; its 

 colour is of a reddish brown or purple, 

 growing on rocks at low- water mark. 



Some of the most beautiful are those 

 growing on other and larger species, as 

 the Sphacelaria, a small and delicate 

 plant, characterised by a symmetry that 

 extends to the individual offsets. The 

 seed-vessels, which are borne at the 

 extremity of the fronds, contain, in 

 some species, both "sperm-cells," and 

 " germ-cells ;" fig. 123 shows a terminal portion of a branch 

 of Sphacelaria cirrhosa. A genus of Cutleriacece is very 

 remarkable, inasmuch as its seeds, or 

 zosporanges, occur at the bases of tufted 

 hairs, are oblong-stalked bodies, divided 

 by perpendicular and transverse septa, 

 each of which contains a seed capable 

 of germination. In fig. 124 is shown 

 a section of a frond of the Cutleria 

 dichotoma, with its eight chambers of 

 zosporanges growing in tufts with inter- 

 calated hairs. 



Cladoplwra, rupestris, so called from 

 its appearing like a series of branches 

 upon branches, or branch -bearing, is 

 commonly found near high -water 

 mark. 



Rhodymenia jubata, signifying red 

 membrane, is one of the Dulse family. 

 In the Islands of the Archipelago, it is a favourite in- 

 gredient in ragouts, to which it imparts a red colour, 



Fig. 123. Sphacelaria 

 cirrhosa. 



