SOME NEW BEITISH MARINE ALG^, 275 



AcrochcBte parasitica Oltmanns, Bot. Zeit. Dec. 16th, 1894. 

 Berwick-on-Tweed, on Fuci, May and June, 1895. On examining 

 some Fuci sent from Berwick by my brother James, I was pleased 

 to find several of them were attacked by this parasite. I have 

 since found tlie plant is not uncommon at Berwick, and most 

 probably at many other stations on our northern coast. My speci- 

 mens agree well with Oltmanns's description and figures. 



Blastopkysa rhizopus Rke. Ahjenfi. der Westl. Ostsee, p. 87 ; Atlas 

 D. Meer. pi. 23. Cumbrae and Yarmouth, in Enteromorpha com- 

 pressa, E.A.B. My specimens of this species agree fairly well 

 with Huber's figures [Ann. Sc. Nat. ser. 7, vol. 16, pi. xvii.) of this 

 plant, but are not so large as the specimens figured by Reinke. 



Enduderina leptocJuete Huber, Aim. Sc. Nat. ser. 7, vol. xvi. Bot. 

 p. 319, pi. XV. figs. 1-9. Mr. Buffham has kindly sent me some 

 good specimens of this plant in the cell- walls of Ectocarpus peni- 

 cillatus gathered at Teignmouth in August, 1893. 



Tellamia intricata Batt. Ann. Bot. ix. p. 168, March, 1895. 

 Weymouth ; Padstow. 



T. contorta Batt. I. c. Weymouth ; Cumbrae ; Berwick ; Pad- 

 stow. In the June number of the Annals of Botany I have given a 

 full description of these two interesting plants, which differ from 

 all other known algre in attacking the periostracum of shells. This 

 membrane, so far as I am aware, resists the attack of all other 

 perforating algffi, and thus protects the chalky portions of the shell 

 from their disintegrating action. 



Ph^ophyce^. 



Scytosiphon pygmceus Rke. Alqenfl. der Westl. Ostsee, p. 60 ; Atlas 

 D. Meer. pi. 14. Weymouth, April, 1892, E.A.B. 



Bufhamia speciosa Batt. Atin. Bot. ix. p. 168, & pp. 307-311. 

 Weymouth, E.A.B. 



Ulonema rhizophorum Foslie, New Norwe;/. Aly. p. 19, pi. iii. 

 figs. 11-17. On Dumontia filiformis, Berwick-on-Tweed ; not un- 

 common, E.A.B. Probably common all round our coast. 



Gobia baltica Rke. Algeyifl. p. 65. Dunbar, E.A.B. In most 

 respects this plant resembles Dictyosiphon Mesogloia, but the cor- 

 tical layer of fertile specimens is composed of numerous simple 

 2-3 -celled, clavate or cylindrical filaments, between which the 

 sporangia are borne. 



Mesogloia Leveillei Menegh. Alghe Ital. p. 283, pi. 5. Guernsey. 

 I am indebted to Mr. E. M. Holmes for a portion of a specimen of 

 this species gathered in Guernsey in the autumn of 1894. 



Lithoderma fatiscens Aresch. Obs. iii. p. 23 ; Hauck. Meeresalg. 

 fig. 177, p. 403. Cumbrae, on a shell dredged from 8-10 fathom- 

 water, E.A.B. 



Symphyocarpus strangulans Rosenv. Groenl. Havalg. p. 896, 

 figs. 28 & 29. Berwick-on-Tweed, on shells and stones between 

 tide-marks, rare, E.A.B. 



PhcBostroma pustulosum Kuckvick. Schriften des Natiirwissensch. Ver- 

 einsfiir Schlesung-Holstein, Band x. p. 43. On Laminaria saccharina 

 var. phyllitis, and on old Zostera leaves. Cumbrae and Berwick, 



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