134 THE MARINE BOTANIST. 



is covered with sand or mud. Frequent on the 

 shores of Great Britain, Ireland, and the Channel 

 Islands. ^ squarrosa dredged in four to five fathoms 

 water. Plymouth Sound, Rev. W. S. Hore. 



LAURENCIA TENUISSIMA.— SLENDER 

 LAURENCIA. 



Branches set with slender bristle-like ramuli, 

 narrowed at their insertion, and more or less taper- 

 ing* at the tips. Fronds tufted, from six to eight 

 inches. Substance very tender, between gelatinous 

 and cartilaginous. Colour, a pale purplish, or 

 pinky red, becoming yellowish. Grows on rocks 

 and other algse between tide-marks. Very rare. 

 Annual. Summer and Autumn. 



CHRYSYMENIA. 



Name meaning golden membrane, because the species assume 

 golden hues if steeped for some time in fresh water. 



Frond tubular, continuous, neither constricted 



nor jointed, filled with a watery juice, traversed 



