352 Marine Algce of Benvick-on-Tweed. 



Exsicc. Polysiphonia fastigiata, Wijatt, Alg. Danm., no. 177; Crouan, 



Alg. Finist., no. 307; Le Jol., Alg. Mar. Cherb., no. 79. 

 Syn. „ „ /. Ag., Spec. Alg. n., p. 1029 ; Ktz., Spec. 



Alg., p. 809 ; Johnston, Fl. Berw. n., p. 235. 

 Hutchinsia fastigiata, Ag., Syn. p. 53 ; Hook., Fl. Scot., pt. n., p. 87. 

 Conferva polymorpha, Linn., Syst. Nat. n., p. 721 ; Light/., Fl. 



Scot., p. 989 ; Dillw., Conf., p. 81, t. 44. 

 Hdb. On Faci especially Ascophyllum nodosum, between tide- 

 marks. Very common. Frnit June — Ang. 



Polysiphonia atro-rubescens (Dillw.) Grev. 



Fl.Edin.,p. 308. — Conferva atro-rubescens, Dillw. , Conf. t. 70. 

 Descr. Polysiphonia atro-rubescens, Harv., Phyc. Brit. 

 Fig. „ „ Harv., I.e. pi. 172. 



Exsicc. „ „ Crouan, Alg. Finist., no. 308; Le 



Jol., Alg. Mar. Cherb., no. 35. 

 Syn. „ „ Ktz., Spec. Alg., p. 821 ; J. Ag., Spec. 



Alg. ii., p. 1035 ; Ktz., Tab. Phyc. xm., t. 82. 

 Hutchinsia atro-rubescens, Ag., Spec. Alg. n., p. 64. 

 Polysiphonia badia, Grev. in Hoolc., Br. Fl. u., p. 331 ; Johnston, 



Fl. Berw. n., p. 237. 

 Conferva badia, Dilhv., Conf. p. 85, t. g. 



Hutchinsia badia, Ag., Syn. p. 56; Hook., Fl. Scot, u., p. 88. 

 Polysiphonia Agardhiana, Grev., Scot. Crypt. Fl. t. 210; Harv. in 

 Hook., Br. Fl. n., p. 331 ; Ktz., Spec. Alg., p. 811 ; Ktz., Tab. 

 Phyc. xm., t. 49 ; Wgatt, Alg. Danm., no. 134. 

 Hdb. On rocks and stones in sandy pools near low-water mark. All 

 the year. Fruit May — Oct. Not uncommon. Berwick Bay, 

 Sharper Head, Spittal, Holy Island, Scremerston. 



Polysiphonia nigrescens (Huds.) Harv. 



in Hook., Br. PL n., p. 332. — Conferva nigrescens, ITuds., 

 Fl. Angl., p. 602. 

 Descr. Polysiphonia nigrescens, Harv., Phyc. Brit. 

 Fig. „ „ Harv., I.e. pi. 277. 



Exsicc. „ „ Wgatt,. Alg. Danm., no. 135 ; Crouan, 



Alg. Finist., no. 310; Le Jol., Alg. Mar. Cherb., no. 218. 

 Syn. „ „ J. Ag., Spec. Alg. n., p. 1057; Ktz., 



Spec. Alg., p. 813; Id., Tab. Phyc. xm., t. 56; Johnston, Fl. 

 Berw. ii., p. 236. 

 Hutchinsia nigrescens, Ag., Syst. p. 151. 

 Polysiphonia fucoides, Grev., Fl. Ediu., p. 308; Johnston, Fl. Ber. 



ii., p. 236. 

 Conferva fucoides, Huds., Fl. Angl., p. 603 ; Dillw., Conf. p. 81, 

 t. 75, figs. 1 and 3 ; Eng. Bot., t. 1743. 

 Hob. On rocks and Algas between tide-marks. Fruit May — Sept. Very 

 common. 



