165 



Punctariacese and place it near Litosiphon. The slight resemblance between 

 this species and Pylaiella littoralis does not show anything more than a 

 relation between the two families. 



E. Icel. KolfreyjustaOin-, Holmanes. 

 NW. Icel. IsafjorOur. 



SW. Icel. HvammsfjorOiir, Stykkishulmur; Reykjavik (rironlund, CO); 

 Njardvik (G. 0.). 



S. Icel. Eyrarbakki, Veslmannaeyjar. 



Stictyosiphon tortilis (Rupr.) Rke. Atlas Tab. 31—32, Rosenv. Grl. 

 Havalg. p. 8G8. i^hloeospora tortilis Stromf. Algveg. p. 51 ; Phloeospora 

 subarticulata Kjellman Bidrag p. 78. 



In pools and rocks in the lower litoral region and on stones and 

 other algffi in the upper sublitoral region down to a depth of c. 5 fathoms. 

 The largest specimens are 30 cm. long. Fructiferous specimens have been 

 met with in June— August. 



E. Icel. BerufjorOur, Vattarnes, Holmanes. 



N. Icel. Grmisey (0. D.); Eyjaf jorOur : SkagafjorOur (Stromfelt). 



NW. Icel. Broddanes; DyrafjorOur (G. 0.). 



SW. Icel. Melar, Reykjavik. 



I'hieostroina |Mi$tulo$uin Kuckuck Ueber einige neue Phaeosporeen dei- 

 westl. Ostsee, Bot. Zeit. 1895, p. 182, 

 Taf. Vlh Rosenv. Deux. Mem. p. 68, 

 fig. 15. 



I have met with this species in 

 the litoral region on Scytosiphon lo- 

 mentarius, Ghorda tomentosa, Phylhtis 

 fascia and Laminaria saccharina f. phyl- 

 htis. I have also found it in the sub- 

 litoral region on young Laminaria sac- 

 charina in a depth of 3 — 4 fathoms. 



The plants I have referred to this 

 species are varying, especially regarding 

 the condition of the basal portion of 

 the frond. Specimens growing on 

 looser substratum, as the surface of 

 fructiferous Scytosiphon and Ghorda, 

 have a basal portion consisting of free 

 filaments, whereas specimens growing 

 on hrmer substratum, as the surface of 

 Laminaria, have a basal disc with mar- 

 ginal growth. 



Fig. ^20. 

 Phaosfroma pustulosnm Kuck. 

 a a vertical filament with a youni-' 

 terininiil plurilocular spoiaiiiriuiii, 

 connected with a liorizontal filament 

 (to right) Itearing a young hair; 

 l> fragment of a hmi/.ontal lilanienl 

 with a plurilocular sporangiuni; c, a 

 horizontal filament with a hair, the 

 end of which (to riglit) is growing 

 inwards. (31(i : 1.) 



