262 Marine Algce of Berwick-on-Tweed. 



I have only once met with this plant at Berwick and presume 

 it to be very rare. The filaments are very slender and silky, of 

 a pale green colour, fading to a dirty yellowish green, almost 

 white, after it has been in the herbarium for some time. The 

 branching is very irregular, the branches given off at wide 

 angles, and often re-curved. 



Cladophora laetevirens (Dillw.) Harv. 



Phyc. Brit, (non Ktz. nee. Crouan.) — Conferva laetevirens, 

 Dillw. Oonf. t. 48. 

 Descr. Cladophora laetevirens, Harv., Phyc. Brit. 

 Fig. „ „ Harv., I.e. pi. 190. 



Exsicc. Conferva laetevirens, Wyatt, Alg. Danmon., no. 143. 

 Syn. Conferva glomerafca, b. marina Roth, Cat. Bot. m., p. 237. 



Conferva glomerata, b. littoralis, Johnston, Fl. Berwk. n., p. 255. 



F. GLOMERATA, Thuret, 



in Le Jol., Liste Alg. Mar. Cherb., p. 62. 

 Exsicc. Cladophora laetevirens, Cocks, Alg. Fascic., no. ( J3. 

 Ilab. On rocks and Algas in pools from half-tide level to low-water 

 mark. March — Sept. Common. Berwick Bay, Holy Island, 

 Burnmouth, Spittal. 

 A common species recognised by its bushy habit and yellowish 

 colour. The filaments are coarse and rigid, and do not collapse 

 when the plant is removed from the water. 



Cladophora Hutchinsle (Dillw.) Harv., 



in Hook., Br. Fl. n., p. 357. — Conferva Hutchinsiae, Dillw., 

 Conf. t. 109. 

 Descr. Cladophora Hutchinsiae, Harv., Phyc. Brit. 

 Fig. „ „ Harv., I.e. pi. 124. 



Exsicc. Conferva Hutchinsiae, Wyatt, Alg. Danmon., no. 226. 



Cladophora Hutchinsiaa, Le Jol., Alg. Mar. Cherb., no. 213. 

 Syn. „ „ Ktz., Spec. Alg., p. 391. 



Cladophora diffusa, Harv., Phyc. Brit., pi. 130; Wyatt, Alg. 



Danmon., no. 144. 

 Cladophora Hntchinsiaj var. distans, Ktz., Spec. Alg., p. 392. 

 Hob. In tide-pools near low-water mark. May — Sept. Rare. Ber- 

 wick Bay. Burnmouth. 

 A handsome coarse-growing species, with few, distant branches, 

 and very short obtuse ramuli. The endochrome in the living 

 plant entirely fills the internode, but on drying it contracts 

 towards the joints, leaving a clear pellucid space in the middle 

 of each articulation. 



