Marine Algca of Berivick-on-Tiveed. 293 



Exsicc. „ ,, Wyatt, Alg. Darim., no. 57. 



Syn. „ ,, J. Ag., Spec. Alg. i., p. 66 ; Ktz., Spec. 



Alg., p. 546. 

 Gigartina flagelliformis, Lamour., Ess., p. 48 ; Duby, Bot. Gall. 

 II., p. 952 ; Johnston, PI. Berwk. n., p. 234. 

 Hab. On rocks and stones near low-water mark. Common. May — Dec. 

 Berwick Bay, Sharper Head, Scremerston, and elsewhere along 

 the coast. 

 A variety in which the main stem is densely clothed with 

 short pointed branches, occurs with us ; it is probably Farlow's 

 var. densa. 



Tribe IlL—MESOGLCEE^. 



MESOGLCEA, Ag. 



Mesogiaea vermicularis (Eng. Bot.) Ag. 



Syn., p. 126. — Blvularia vermiculata, Eng. Bot., t. 1818. 

 Descr. Mesogloia vermicularis, Sarv., Phyc. Brit. 

 Fig. „ „ Haw., I.e. pi. 31. 



Exsicc. „ ,, Wyatt, Alg. Damn., no. 100 ; Crouart, 



Alg. Finist., no. 54 ; Le Jol., Alg. Mar. Cherb., no. 32. 

 Syn. Mesoglcea vermiculata, Le Jol., Liste, p. 87. 



Mesoglcea vermicularis, /. Ag., Spec. Alg. i., p. 58. 



,, „ var. b., septentrionalis, Ktz., Spec. Alg., 



p. 545. 

 Alcyonidium vermiculatum, Lamour. 

 Trichocladia vermicularis, Sarv., in Mack., PI. Hiber., part 3 



p. 186. 

 Helminthocladia vermicularis, Harv., Gen. S. Afr. PI., p. 397 ; Id., 



Man. 1st Ed., p. 45. 

 Chagtophora vermiculata, Hook., Fl. Scot., part 2, p. 75. 

 Hab. On rocks and stones near low-water mark and below. July and 



Aug. Very rare. Holy Island. 

 The thick, irregularly pinnate branches, and the clavate peri- 

 pheral filaments distinguish this species from Castagnea virescens, 

 the only British plant with which it is at all likely to be con- 

 founded. 



CASTAGNEA (Derb. et Sol.) Thuret. 



Castagnea virescens (Carm.) Thur. 



in Le Jol., Liste Alg. Mar. Cherb., p. 85. — Mesogloia 

 virescens, Carm., Alg. Appin. ined. ; Hoolc., Brit. Fl., vol. n., 

 p. 387. 



