KONGL, SV. VET. AKADEMIENS HANDLINGAU. BAND. 20. N:0 5. 315 



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. 

 Fig. Lyngbya Carmichselii Harv. Phyc. Brit. t. 186, A. 

 " Cutlerise » » » t. 336. 



» speciosa » » » t. 186, B. 



Conferva Youngeana « » » t. 328. 



Exsicc. Conferva' speciosa Aresch. Alg. Seand. exsicc. N:o 132, 185. 

 » hormoides » » » » » 133, 186. 



Hormiscia flacca » « « » » 342. 



Urospora mirabilis » » » » » 340. 



» penicilliformis Wittr. et Nordst. Alg. exsicc. N:o 417, 418. 



Syn. Conferva hormoides J. G. Ac. Spetsb. Alg. Progr. p. 2; Bidr. p. 11, 

 » » LiNDBL. Bot. Not. p. 158. 



» » WiTTR. in Heugl. Reise, p. 284. 



» Youngeana Croall, F1. Disc. p. 461. 

 Lyngbya Carmichselii Ceoall, 1. c. p. 461. 

 » flacca » « a 462. 



» speciosa » » » » 



Urospora mirabilis Kleen, Nordl. Alg. p. 46. 



» penicilliformis Kjeli.m. Spetsb, Thall. 2, p, 55; Algenv. Murm. Meer. p, 56. 



Habitat. This alga is litoral, usually growing on stones and rocks above tide- 

 mark, sometimes in rock-pools within or somewhat above the litoral zone. It grows 

 gregarious in considerable masses both on exposed and sheltered coasts, but exposed 

 localities are preferred by it. I have found specimens with zoospores at Spitzbergen 

 in the middle of Jyly, at Novaya Zemlya at the end of Jyly, on the north coast of 

 Norway in August. 



Geogr. Distrib. It is probably circumpolar. However it has not been found as 

 yet in the Siberian and American Arctic Seas. Its maximum of frequency is on the 

 north coast of Norway. The most northern place where it has been taken is Treuren- 

 berg Bay on the north coast of Spitzbergen, Lat. N. 79° 56'. 



Localities: The Norwegian Polar Sea: Nordlanden, common; Finmarken, local, but 

 abundant at Maas5. 



2Vie Greenland Sea: the north-east and south-east coasts of Spitzbergen, local and 

 scarce. 



The Kara Sea: Kjellman's lies, scarce. 



Baffin Bay: the coast of Greenland at Frideriksdal, Nanortalik, Serrailik, Julianes- 

 haab, Godthaab. Besides, it has been found floating in the sea at several places off 

 the coast. (Cp. Croall 1. c. and Dickie, Alg. Sutherl. 1, p. 143). 



