Contribution. I. 145 



thread. Cp. t. 2, fig. 17—19. Perhaps the species, in the 

 sense here taken, includes two different forms. 



The species in question is litoral, and grows on wood- 

 work or epiphytic on Fucacece. Once I met with it attached 

 to Bhodymenia palmata. It also occurs on rocks at high- 

 water mark, especially in localities where small freshwater- 

 streams are moistening the rock. Specimens with zoospores 

 have been collected in August. 



Bisribution: Found at Svserholt, Kjollefjord and Vardo, 

 rather scarce, and at Pasvig and Smaastrommen in Sydva- 

 ranger, local but pretty plentiful. 



Fam. Confervacese (Bonnem.) Lagerh. 



in Ber. Deutsch. bot. Ges. Bd. 5, p. 409; Bonnem. in Journ. Phyc. XCIV, 

 p. 193; lim. mut. 



Gen. Urospora Aresch. 

 Obs. Phyc. 1, p. 15. 



Urospora penicilliformis (Roth) Aresch. 

 Obs. Phyc. 2, p. 4; Conferva penicilliformis Roth. Cat. Bot. 3, p. 

 271. 



Descr. Urospora penicilliformis Aresch. 1. c; excl. syn. plur. 



Ulothrix isogona Farl. New. Engl. Alg. p. 45. 



Fig. Hormotrichum pcnicilliforme Kiitz. Tab. Phyc. 3, t. 64. 



a vermicular e Kiitz. 1. c. 



„ isogonum Kiitz. 1. c. t. 65. 



„ Younganum 'Kiitz. 1. c. 



Lyngbya speciosa Harv. Phyc. Brit. t. 186, B. 



Conferva Youngana Harv. 1. c. t. 328. 



Fxsicc. Lyngbya speciosa Wyatt, Alg. Danm. Nr. 196. 



Conferva speciosa Aresch. Alg. Scand. exsicc. Nr. 132 et 185. 



„ hormoides Aresch. 1. c. Nr. 133 et 186. 



Urospora mirabilis Aresch. 1. c. Nr. 340. 



„ penicilliformis Wittr. et Nordst. Alg. exsico. Nr. 417 



et 418. 



10. 



