CONFERVACE.E. 261 



Cladophora ropestris, var. /3. distorta. 



" Tufts rooting in the nmd, depressed ; filaments short, 

 much curled and matted together; ramuli squarrose." — 

 Harv. 



" Found on sub-marine peat at Biturbui Bay, Conne- 

 mara, by Mr. M'Calla." 



Cladophora rectangularis. The rectangular 

 Cladophora. 



Fronds tufted, rigid, entangled, from six inches to a 

 foot long ; branches opposite, spreading, distant, pinnate ; 

 branchlets opposite ; cells about twice the length of their 

 diameter, uniform throughout the frond. 



This very beautiful and rare species was first found at 

 Torquay, by Mr. Borrer, in 1832. It grows in deep 

 water during summer, and is annual. 



Cladophora laetevirens. The pale-green Clado- 

 phora. 



Fronds tufted, much divided, from six to eight inches 

 long, of a soft texture and yellow-green colour ; branches 

 spreading, crowded, of unequal lengths ; branchlets some- 

 what curved, obtuse at the tip ; cells of the branches about 

 six times the length of their diameter, those of the branch- 

 lets about thrice. 



This species is very common. It grows on rocks and 

 sea- weeds, between the tide-marks, during summer, and 

 is annual. It resembles the fresh-water C. glomerata, 

 and the two plants are perhaps only different forms of 

 the same species, altered by the circumstances of their 

 growth, the one being distinctly marine, and the other 

 as distinctly fluviatile. 



