SOME NEW T3TUTTSII MARINE ALGiE. 11 



it seems likely that many more opportunities may arise of con- 

 necting his name with the soa-weccls of Britain. 



In his recent Analecta Ali/olor/ica: Continuatio, ii., Prof. J. G. 

 Agardh, besides raising the varieties vimineum, corymhoHum, and 

 hotrtjocarpum of Ceramiuw ruhnuii to specific rank, records three 

 new Ceramia, i. e., C. Crouanianum, C. fniticulusum, and C. ar- 

 horescens from Britain. As the specimens were in most cases sent 

 to Prof. Agardh by Mrs. Griffiths, we presume the new species were 

 found on the coast of Devonshire or Cornwall. 



lihndodiscus pulcherrimns Crn. Ann. Sc. Nat. 4th ser. xii. pi. xxii. 

 figs. 29-33. On an old Solen shell, Plymouth, Oct. 1895. I was 

 fortunate enough to find a specimen, now in the Herbarium of the 

 British Museum, of this most interesting plant when examining 

 some old Solen shells from Plymouth Sound, which Mr. George 

 Brebner had sent to me to examine for perforating alg^. I trust 

 that before long Mr. Brebner will be able to send me some more 

 specimens of this plant, which perhaps, when specially sovight for, 

 may not be so rare as is generally supposed. 



Peyssonnelia Rosenvingii Schmitz, in Rosenv. Groenlands lla- 

 valger, p. 782. Near low-water mark, Berwick-ou-Tweed, February, 

 1888, From an examination of the figure and description of this 

 species it appeared to me so probable that this species might be 

 mistaken for P. Hari-eyana that I re-examined all my specimens so 

 named, with the result that I actually found one or two specimens 

 of P. Rosenvingii amongst them. 



P. rubra J. Ag. Spec. Alg. h. p. 502 ; iii. 386. Birturbui Bay, 

 on the Scallop Bank, August, 1846, William McCalla d- Prof. W. H. 

 Harvey. Harvey's figure and description of Peyssonnelia [Crnoriella) 

 Dubyi in Phycologia Britannica always appeared to me so different 

 from that given by the brothers Crouan of their plant, that I was 

 doubtful whether both authors referred to the same species. 

 Through the kindness of Prof. E. P. Wright, I have been enabled 

 to examine Harvey's original specimens, and I have no hesitation 

 in saying that all his Birturbui Bay specimens are referable to P. 

 rubra. The specniiens in the collections presented to Kew and the 

 Linnean Society by Prof. Harvey are also referable to P. rubra. 

 Although there are no specimens from the West of Scotland in any 

 of the collections which belonged to Harvey, I have no doubt that 

 the specimens from that locality mentioned by hnn in Phyc. Brit. 

 are referable to Cruonella Dubyi, a species which is by no means 

 uncommon at Cumbrae and elsewhere on the west coast. 



P. atropurpurea Crn. Aly. Mar. Finist. 23 ; Flonde du Finistere, 

 p. 148. Penzance, Aiigust, 1889, A. H. Teague. 



Cruoria rosea Crn. Fl. Finist. 147. Plymouth, Nov. 26, 1895. 

 Simultaneously detected by Mr. Brebner and myself on old shells 

 dredged from "The Queen's Ground," Plymouth Bay. 



In conclusion, I may say that Mr. Brebner purposes to publish 

 shortly figures of the species of Colaconema and Trailliella, and that 

 Mr. Buffham similarly purposes to publish a description and figure 

 of Bonnemaisonia hamifera. 



