J 



In 



MARINE ALGAL VEGETATION 



77 



Corallina officinalis. 



Petroderma maculiforme. 



Myrionema Laminaria? (in E. Greenl.) 



M. vulgare. 



M. Corunnse. 



M. faeroense. 



Ascocyclus islandicus. 



Ectocarpus tomentosus. 



E. fasciculatus. 



E. Hinksia?. 



Sphacelaria olivacea. 



Dictyosiphon Ekmani. 



D. Mesogloia. 



Desmarestia ligulata. 



Leathesia difformis. 



Laminaria saccharina (in E. Greenl.) 



L. freroensis. 



L. hyperborea. 



Alaria esculenta in E. Greenl.) 



Fucus spiralis. 



F. serratus. 



Pelvetia canaliculata. 



Of the 57 species here mentioned three are found in East Green- 

 land: viz. Myrionema Laminarice, Laminaria saccharina and Alaria 

 esculenta. It is most probable that none of these 57 species will be 

 met with in West Greenland, with the exception, perhaps, of some 

 of the .l/yrzonema-species. 



There are 74 species absent from East Greenland which are found 

 in Iceland. Of these, 54 species have already been mentioned (see 

 above), and to these must be added 20 species which are absent 

 from East Greenland but present in West Greenland and Iceland. 

 These species are the following: — 



Bangia fuscopurpurea. 

 Porphyra umbilicalis. 

 Chantransia secundata. 

 C. virgatula. 



Polysiphonia urceolata. 

 Antithamnion floccosum. 

 Ceramium rubrum. 

 Ralfsia ovata. 

 R. verrucosa. 

 Microsyphar Polysiphonise. 



Ectocarpus Stilophorse. 

 E. tomentosoides. 

 E. penicillatus. 

 Sphacelaria radicans. 

 Litosiphon filiformis. 

 Phyllitis zosterifolia. 

 Dictyosiphon Chordaria. 

 D. corymbosus. 

 D. hippuroides. 

 Castagnea virescens. 



It seems most probable that these 20 species are to be met 

 with in East Greenland. 



The 11 species present in E. Iceland and absent from West 



Greenland are included in the above-mentioned figure. They are: — 



Gigartina mamillosa. Laminaria saccharina (in E. Greenl.) 



Delesseria sangvinea. L. fseroensis. 



Odonthalia dentata. L. hyperborea. 



Dumontia filiformis. Alaria esculenta (in E. Greenl.) 



Lithothamnion flavescens. Fucus spiralis. 



L. Ungeri. 



The 23 species present in E. Iceland and absent from East Green- 

 laud have also been already recorded. With the addition of the 9 

 of the above-mentioned species they are the following: ■ — 



