250 Marine Algce of Berwioh-on-Tweed. 



Enteromorpha erecta (Lyngb.) Hook. 



Br. Fl. ii., p. 314. — Scytosiphon erectus, Lyngb., Hyd. Dan., 

 p. 65 t. 15. 



Descr. Enteromorpha erecta, Harv., Phyc. Brit. 



Fig. ,, ,, Harv., I.e. pi. 43. 



Exsicc. „ ,, Wyatt, Alg. Danmon., no. 166. 



Syn. „ „ J. Ag., Till. Alg. Syst, vi., p. 152. 



Conferva paradoxa, Dilhv., Brit. Conf., p. 10; Ulva clathrata, var. 



erecta, Le Jol., Liste. Alg. Mar. Cherb., p. 52. 

 Enteromorpha clathrata, var. erecta, Grev., Alg. Brit., p. 181. 

 Hah. In shallow pools between tide-marks. Aug. — Nov. Bare. Holy 

 Island. 



Enteromorpha ramitlosa (Eng. Bot.) Hook. 



Br. Fl. ii., p. 315.— Ulva ramulosa, Eng. Bot. t. 2137. 

 Descr. Enteromorpha ramulosa, Harv., Phyc. Brit. 

 Fig. „ „ Harv., I.e. pi. 245. 



E.vsicc. „ ,, Wyatt, Alg. Danmon., no. 208. 



Syn, Ulva clathrata var. nncinata. Lp. Jol., Liste des Alg. Mar. Cherb.,p.51. 

 Enteromorpha ramulosa, Ktz., Spec. Alg., p. 479 ; Id., Tab. Phyc. 

 vi., t. 331 ; J. Ag.,Till. Alg. Syst. vi., p. 154 ; Haucl; Meeresalg. 

 Enteromorpha spinescens, Ktz., Tab. Phyc. VI., p. 12. t. 33. 

 Enteromorpha clathrata var. nncinata, Grev., Alg. Brit., p. 181. 

 Hah. On rocks ; also epiphytic on the smaller Alga? between tide-marks. 

 July and Aug. Berwick Bay. Rocks north of the " Needle 

 Eye." Not uncommon. 

 A rigid, rather coarse species, distinguished hy its squarrose habit 

 and curved branches, everywhere beset with short spinelike ramuli. 



Enteromorpha Hopkirkii, MeCalla, 

 Alg. Hib. ined. 



Descr. Enteromorpha Hopkirkii, Harv., Phyc. Brit. 



Fig. „ „ Harv., I.e. pi. 263. 



Syn. „ „ J. Ag., Till. Alg. Syst. VI., p. 151 ; 



Farloito, Mar. Alg. New Eng., p. 44. 



Hah. On rocks, or epiphytic on the smaller Alga? in pools between 

 tide-marks. Aug. Rare. Berwick Bay. 



A very beautiful species, easily known by the extreme tenuity 

 of the filaments, which are as slender as those of the most delicate 

 species of Cladophorrr, and excessively branched, the ramuli ending 

 in a single row of cells. In the present species, and Enteromorpha 

 Ralfsii, each of the large, hyaline cells contains a small bright 

 green speck of endoclirome in its centre, the rest of the cell 

 being empt3 r , on this account it has been proposed to remove 

 these two species to a different genus. 



