Contribution. I. 129 



Spec. Alg. p. 349. 



Descr. Schizogonium radicans Gay 1. c. 



Ulothrix discifera Kjellm. Spetsb. Thall. 2, p. 52. 

 Fig. „ radicans Kiitz. Tab. Phyc. 2, t. 95. 



„ discifera Kjellm. 1. c. t. 5, fig. 10 — 14. 

 Syn. Hormidiuni niurale De-Toni, Syll. Alg. 1, p. 156; ex parte fide 



syn. 



Iii the eastern part of the district I met with a Schi- 

 zogonium which no doubt is identic with Ulothriz radicans 

 Kiitz. It corresponds well with fig. a. a', a", and b. c. e. in 

 Kiitz. Tab. Phyc. 1. c. This plant is considered by De- 

 Toni to belong to Hormidiuni murale. I agree with Gay 

 as to the limitation of the latter, and beep Scliiz. radicans 

 a distinct species. On the other hand, the Finmarkian spe- 

 cimens fully coincide with Vtotlirix discifera Kjellm. in 

 shape as well as thickness. Individuals which exactly re- 

 semble the figures by Kj ell man 1. c, except fig. 12, were 

 common together with other resembling the figures byKiitz- 

 ing, and without any limit between them. Sometimes two 

 threads are grown together. 



The present plant occurs on rocks at or a little above 

 high-water mark, on exposed coast. It forms rather thin 

 but densely interwoven strata, mostly with rough or undu- 

 late-lacunosed surface. It also grows in small number toge- 

 ther with other smaller algse on rocks between tides. 



Distribution: Found at Horn 5 on Vardo, local but 

 pretty plentiful, and in two localities at Vardo together 

 with Calothrix and other algse, scarce. 



Fam. Cladoplioracese (Hass.) Wittr. 



Pitoph. p. 42; Hass. Brit. Freshw. Alg.; lim. mut. 



Gen. Spongomorpha Kiitz. 

 Phyc. gener. p. 273. 



9. 



