320 Marine Algce of Berwick-on-Tweed. 



E.csicc. Callithamnion Rothii, Wyatt, Alg. Danm., no. 188 ; Crouan, 



Alg. Finist., no. 120; Le Jol., Alg. Cherb., no. 42. 

 Syn. „ „ Etz., Spec. Alg., p. 640; Id., Tab. Phyc. 



xi., t. 62; J. Ag., Spec. Alg. n., p. 17; Id., Epicr. p. 13; John- 

 ston, Fl. Berwk. n., p. 241. 

 Thamnidium Rothii, Thur. in Le Jol., Lisfce, p. 111. 

 Trentepohlia Rothii, Harv. in Mack., Fl. Hiber., pt. 3, p. 218. 

 Ceramium Rothii, Ag., Syst. 

 Byssns purpurea, Eng. Bob., t. 192. 

 Conferva purpurea, Dilliu., t. 43. 

 Hab. Forming velvety patches on rocks from high-water mark to half- 

 tide level. Fruit Jan. to March. Common. Berwick Bay, 

 Greenses, Coves, Sharper Head, Burnmouth, Scremerston. 



Rhodochorton fxoridulum (Dillw.) Nag. 



Morph. und Syst. der Ceramiacese, p. 358. — Conferva 

 floridula, Dillw., Conf. Suppl., p. 73, t. f. 

 Defter. Callithamnion floridulum, Harv., Phyc. Brit. 

 Fig. „ „ Harr., l.c pi. 120a. 



Thamnidium floridulum, L? Jol., Liste, pi. VI., figs. I, 2. 

 Er.sicc. Callithamnion floridulum, Wyatt, Alg. Danm., no. 219 ; Crouan, 



Alg. Finist., no. 112; Le Jol., Alg. Mar. Cherb., no. 102. 

 Syn. „ ,, J. Ag., Spec. Alg. n., p. 19; Ktz., Spec- 



Alg., p. 640; .7. Ag., Epicr. p. 13. 

 Hab. On sand-covered rocks between tide-marks, usually most plentiful 

 near low-water mark. All the year. Fruit Oct. — Feb. 

 Common. Berwick Bay, and elsewhere along the coast. 



Rhodochorton intermedium, Kjellm. 



Alg. Arct. Sea, p. 184, t. 15, fig. 8. — Thamnidium inter- 

 medium, Kjellm., Spetsb. Thall. i., p. 28, t. i., fig. x. 

 Hab. On rocks and Alga? between tide-ma,rks. Very rare. Berwick 

 Bay. 



Rhodochorton sparsum (Harv.) Kjellm. 



Alg. Arct. Sea, p. 186.— Callithamnion sparsum, Harv. in 

 Hook., Br. Fl. ii., p. 348. 

 Descr. Callithamnion sparsum, Harv., Phyc. Brit. 

 Fig. „ „ Harv., l.c. pi. 297. 



Syn. „ „ J. G}. Ag., Epicr., p. 14. 



Acrochsetium sparsum, Nceg., Morph. und Syst. Ceram., p. 414. 

 Thamnidium sparsum, Kleen. 



Trentepohlia sparsa, Harv. in Mad-., Fl. Hiber., pt. m., p. 219. 

 Callithamnion floridulum, Lyngb., Hydr. Dan., p. 130, t. 41 (non 

 Harv., nee. Ag.) 

 Hab. On old stems of Laminaria hyperborea, and L. saccharina, also on 

 Cladophora rupestris. Rare. July — Sept. Berwick Bay. 



