790 



indebted to Kl een (51); but Kjellman (48) has fr.rnished ns with 

 important information. We know 123 species of Rhodophijceæ and 

 Phæophyceæ together with about 20 Chlorophyceæ from Nordland, 

 that is very nearly 150 species. 113 of these species are also 

 found at the Færoes, that is, 75 % of the species of Nordland and 

 52. 8% of the Færoese species. Nordland has 123 red and brown 

 algæ, 95 of these are also found at the Færoes, that is, 61 °/o of 

 the Færoese algæ of these groups. The 28 species which are found 

 at Nordland but not at the Færoes are the following: Tiirnerella 

 Pennyi{A)^, Brongniartella byssoides {E i), Spermothamnion Turneri{D), 

 Callithamnion Hookeri (D), Callithamnion roseiim (D), Ceramiiim Des- 

 longchampsii (D), C. circinimtum (D), C. diaphaniim (D), Dilsea ediilis 

 (D), Petrocelis criienta (D), Lithothamnion intermedium (D), L. forni- 

 catiim (D), L. tophiforme (B i), L. norvegiciim (D), Ralfsia deiista (B i), 

 Edocarpus Turnerellæ (D), E. terminalis (D), E. horealis (D), E. ovatus 

 (Bl), E. penicillatus (D), E. draparnaldioides (D), Myriotrichia filiformis 

 (D), Sphacelaria racemosa (Bi), Mesogloia vermiciilaris (D), Sperma- 

 tochnas paradoxus (D), Cutleria multifida (E i), Fuciis ceranoides (D), 

 F. serratus (D). With the exception of some few warm-boreal spe- 

 cies (El), the greater part of these algæ belong to the cold-boreal 

 group (D); we are therefore justified in expecting that some of them 

 may perhaps be found at the Færoes; the other species are arctic 

 or subarctic, and can scarcely be expected there. 



On the other band, the following 60 species are found at the 

 Færoes: Porphyra lencosticta, P. coccinea, Conchocelis rosea, Chan- 

 transia Alariæ, Ch. efflorescens, Ch. virgatula. Choreocolax Polysipho- 

 niæ, Harveyella mirabilis, Phyllophora Brodiæi, Actinococcus snbcu- 

 taneus, Callophyllis laciniata, Callocolax neglecta, Sterrocolax decipiens, 

 Lomentaria rosea, Nitophyllum laceratiim, Laurencia pinnatifida, Po- 

 lysiphonia atrorubescens, Rhodomela subfusca, Griffithsia setacea, Cal- 

 lithamnion scopulorum, C. granulatum, Rhodochorton seiriolanum, Rh. 

 membranaceum, Rhododermis elegans, Phymatolithon lævigatum, Li- 

 thophylhim incruslans, L. hapalidioides , Lithoderma fatiscens, Petro- 

 derma maculiforme, Sorapion Kjellmani, Ralfsia clavata, Myrionema 

 Corunnæ, M. foecundum, M. glohosnm, M. færoense, M. speciosum, Mi- 

 crosyphar Polysiphoniæ , M. Zosteræ, Edocarpus æddioides, E. Stilo- 

 phoræ, E. velutinus, E. ludfugus, E. tomentosoides, E. dasycarpus, E. 

 granulosus, E. Hincksiæ, Leptonema fasciculatum, Eladiista scutulata, 

 Sphacelaria britannica, Sph. cæspitula, Sph. furcigera, Sph. cirrosa, 



^ For explanation of the letters see: Borgesen and Jonsson (12, p. XV — XXI). 



