785 



which, \. pohjstromatica, has been found in North England, and the 

 closely related species Rh. parasitica also in Scotland; Phymatoli- 

 thon compactnm f. circiimscripta (Stromf.) Fosl. is according to Bat- 

 ters (4, p. 97) found in West Ireland, and must therefore also be 

 supposed to be found for instance at Shetland; Ectocarpiis dasycar- 

 pus, found in South England; Ectocarpiis lucifiigiis, a few years ago 

 mentioned from Heligoland, but which must be supposed to be more 

 widely destributed as it has now been found at the Færoes; Ectocarpiis 

 Stilophoræ found in South England; Myrionema foecunda which is 

 perhaps closely related to M. Corunnæ; Microsyphar Polysiphoniæ found 

 in North England; Microsyphar Zosteræ, originally mentioned from 

 Heligoland; Sorapion Kjellmani, most likely the same as Sorapion 

 sinmlans (see Rose uvinge, 71, p. 161, note) which has been found 

 in South England; Petroderma maciiliforme stated from Heligoland; 

 Sphacelaria cæspitiila which according to Batters has been found 

 in North England, but is, however, possibly doubtful, as it has not 

 been given by Sauvageau; Prasiola fiirfiiracea, found for instance 

 in Germany and on the north coast of Norway; Ulothrix pseudoflacca 

 and U. consociata which have but recently been described by Wil le 

 as found in Kristianiafjord and of which we therefore know but 

 little as to how far they are distributed; Pilinia maritima which is 

 known from Greenland and the Færoes and has lately been found 

 by Sauvegeau in the gulf of Gascony; Ulvella con fluens found 

 in South England but which Batters supposes to be common; 

 Codioliim gregariiim, in Batters' list only stated from South Eng- 

 land, but which is mentioned as »not uncommon« in the same 

 author's »List of the marine Algæ of Berwick-on-Tweed« ; Codioliim 

 pusilliim which is possibly found in Scotland (see Batters p. 9), 

 but which is, however, not stated from Scotland in Jonsson's and 

 my own list, as we have felt doubtful as to the correctness of the 

 determination because of the synonyms mentioned by Batters; 

 Chlorogloea tuberciilosa , lately described by Wil le and probably 

 widely distributed; Pleiirocapsa amethystea found at South England; 

 Phormidium aiitiimnale found in North England; Microcoleiis tener- 

 rimus found in South England. 



All these 26 species which are mostly small and therefore only 

 to be discovered by thorough investigation , can with some cer- 

 tainty be supposed to occur on the coasts of Scotland and the sur- 

 rounding isles, and can therefore for comparison be included in 

 the total number. The total number of species thus becomes 195. 



