Marine Algce of Berwick-on-Tweed. 243 



Leibleinia confervicola, Undl. Gen., no. 57, 3rd Suppl., p. 21 ; 



Aresch. Phyc. Scand. et Exsice. ser. nov. 192. 

 Leibleinia ohalybea, Ktz. Spec. Alg., p. 277, Id. Tab. Phyc. t. 84; 



Le Jol. Liste Alg. Mar. Cherb., p. 30. 

 Leibleinia amethystea, Ktz. in Le Jol., Liste Alg. Mar. Cherb., p. 30. 

 Conferva confervicola, Eng. Bot. t. 2576 ; Johnston, PI. Berwk. 



ii., p. 252. 

 Hub. On various small Algae, such as Polysiphorria nigrescens, Ceramium 



rubrum, Chcetomorphu area, &c, &c. Summer and Autumn. 



Very common all along the Berwickshire coast. 



Calothrix -aiRUGiNEA (Ktz.) Thur. 



Ess. Class. Nostoch., p. 10 ; Ann. Sc. Nat. 6th Ser. Bot. 

 1875, vol. i., p. 381. — Leibleinia Eeruginea, Ktz. Phyc. Gen. 

 p. 221. 



Descr. Calotiirix Eeruginea, Thar., I.e. 



Fig. ,, ,, Thur. et Born. Notes Algol, n., pi. 37. 



Syn. Calothrix Eeruginea, Bornet et Flahault, Rev.Nost. Heter.,l.c. p. 358. 

 Leibleinia Eeruginea, Ktz. Spec. Alg., p. 276 ; Id. Tab. Phyc. i., t. 



38, tig. 1 ; Le Jol. Liste Alg. Mar. Cherb., p. 30. 

 Hub. On Ceramium rubrum, Cludophorw, etc., in shallow pools near high 



water mark. Summer. Bare. Sharper Head. Rocks North 



of Dodd's Well. 



Often mixed with Calothrix confervicola, from which it can at 

 all times be known by its bright emerald-green colour and small 



Calothrix Crustacea (Schousb.) Born, et Thur. 



Notes Algol., p. 13, pi. i v. — Oscillatoria Crustacea, Schousb. 

 in Herb. 

 Descr. Calothrix Crustacea, Farluw, Mar. Alg. New Eng., p. 36. 

 Fig. „ ,, Born, et Thur., I.e. 



Exsicc. „ ,, Holmes, Alg. Brit. Bar., no. 27. 



Syn. „ „ Bom. et Flahault, Bev. Nost. Heter., I.e. 



p. 359. 

 Schizosiphon lasiopus, Ktz., Sp. Alg., p. 328. 

 Hob. On rocks and Algte between tide-marks. Bare. Berwick Bay, 

 Greenses. 



A smaller brighter coloured plant than Calotiirix confervicola, 

 from which it can easily be distinguished under the microscope 

 by its numerous intercalary heterucysts. 



