110 



The species seems to have been taken in a rather wide sense 

 b}?- Kj ell man. Some specimens from Greenland, that I have seen, 

 are considered by him to belong to this species, but at least a 

 couple are identic with L. Stromfeltii, bearing mature sporangia 

 as well as newly emptied conceptacles. Cp. Kjellm. 1. c. 



Relation to other species. The plant appears to be most 

 nearly related to L. varians, from which it, however, is separated 

 by essential characteristics. 



Habitat. In the locality known with us it grew in a rock- 

 pool between tides, on a much exposed coast, and is collected in 

 the middle of July. 



Occurrence. Found at Berlevaag in East-Finmarken, rare. A 

 sterile and younger specimen picked up from a depth of about 

 5 — 6 fathom at Mehavn in East-Finmarken probably belongs to 

 the same species. 



Oeogr. Distribution. The Kara Sea (Kjellm an). 



Lithothamnion flavescens Kjellm. 

 N. Ish. Algfl. p. 129 (98). 

 Descr. et Fig. Lithothamnion flavescens Kjellm. 1. c. t. 6, fig. 1 — 7. Cfr. tab. 

 nostr. 8, fig. 1. 



Syn. Lithothamnion flavescens Fosl. Contrib. I, p. 8. 



Remark on the species. This species fastens itself to quite 

 different substrata, as for inst. other crustaceous or branched Li- 

 thothamnia, stones or shells of Balanidee, and thereby it also as- 

 sumes much varying forms as to the shape of the crust. Thus 

 I met with it surrounding the lower branches of L. tophiforme 

 and L. fruticulosum, giving to these plants a coarse and often 

 peculiar appearance, and in a sterile stage easily to be considered, 

 without closer examination, as if the host not really was infested 

 with any epiphyte.- Cp. L. fruticulosum f. flexuosa pi. 8, fig. 1 

 and two of the specimens of L. tophiforme (L. soriferum) repre- 

 sented in Contrib. II, pi. 3, fig. 2. The form I met with on smaller 

 stones, occasionally together with or in part covered by L. colli- 

 culosum, most probably also belongs to th same species. It is, 

 like the epiphytic form, closely adherent to the substratum and 



