785 



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

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

 thon compactum f. circumscripta (Stromf.) P'osl. 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 dasijcar- 

 pus, found in South Eng]and; 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 Faeroes ; Ectocarpiis 

 Stilophorce found in South England; Myrionema foeciinda which is 

 perhaps closely related to M. Coriinnce; Microsyphar Poiysiphonice found 

 in North England; Microsyphar Zostercv , originally mentioned from 

 Heligoland; Sorapion Kjellmani, most likely the same as Sorapion 

 simulans (see Rosenvinge, 71, p. 161, note) which has been found 

 in South England ; Petroderma maciiliforme stated from Heligoland ; 

 Sphacelaria ccespitiila which according to Batters has been found 

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

 been given by Sauvageau; Prasiola fiirfaracea, found for instance 

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

 and U. consociata which have but recently been described by Wille 

 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 Faeroes and has lately been found 

 by Sauvegeau in the gulf of Gascony; Ulvella confliiens 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 Algae of Berwick-on-Tweed« ; Codiolam 

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

 but which is, however, not stated from Scotland in J 6ns son's and 

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

 determination because of the synonyms mentioned by Batters; 

 Chlorogloea tuberculosa, lately described by Wille and probably 

 widely distributed; Pleurocapsa amethystea found at South England; 

 Phormidium autumnale found in North England; Microcoleiis tener- 

 rimiis found in South England. 



All these 26 species which are mostly small and therefore onh^ 

 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. 



