304 KJELLMAN, THE ALGtE OF THE AKCTIC SEA. 



Fam. CONFERVACEiE (Ag.) Wittr. 



Pl. Scancl. p. IG. Conferviie genuinie Ag. Syst. Alg. p. XXV; gen. excl. 



Gen. Spongomorpha Kutz. 



Phyc. gener. p. 273. 



Spongomorpha spinescens Kutz. 



Spec. Alg. p. 418. 

 Descr. Spongomorpha spinescens Kutz. 1. c. 

 Fig. » » » Tab. Phyc. 4. t. 75. 



Eocsicc. •> » Kjellm. in Wittr. et Nokdst. Alg exsicc. N:o 115. 



Addition to the description of this specief. It is to be added to Kutzing's descrip- 

 tion of this species, that it fortns very dense, usually perfectly spherical or flattened- 

 spherical balls of light-green colour, composed of obpyramedical dusters with truncate 

 tops. The nuinerous curved or spiral spine-shaped branches are characteristic of this 

 species, connecting together with the rhizoids the particular branchsysteins and dusters 

 into dense masses. 



Hahitat. This is a litoral alga growing gregarious in great numbers on exposed 

 coasts, attached to other alga^, mest often to Gigartina mamillosa, sometimes to Halo- 

 saccion ramentaceum. I have colleded specimens with zoospores in July on the coast 

 of Finmarken. 



Geogr. Distrib. It is known only from the Norwegian Polar Sea, where it was very 

 abundant at one place and occurred commonly in suitable localities. The most northern 

 point where it has been found is Gjesv^r about Lat. N. 71°. 



Locality: The Norwegian Polar Sea: Finmarken at Maasö, rather local and scarce; 

 Gjesvaär common and abundant. 



Spongomorpha arcta (Dillw.) Kutz. 

 Spec. Alg. p. 417. Conferva arcta Dillw. Brit. Conf. Suppl. p. 67. 

 Descr. Conferva arcta Aresch. Phyc. Scand. p. 426. 

 Fig. Cladophora arcta Harv. Phyc. Brit. t. 135. 



Spongomorpha arcta KtJTZ. Tab. Phyc. 4, t. 74. 

 » centralis » » » 4, t. 80. 



» cymosa » » » 4, t. 74. 



Cladophora comosa » » » 3, t. 79. 



" sacculifera » » » 3, t. 81. 



» stricta » » » 3, t. 80. 



» vaucheriseformis » » 3, t. 78. 



R.xsicc. Cladophora (Conf.) arcta Aresch. Alg. Scand. exsicc. N:o 129, 334, 335. 

 Spongomorpha arcta Wittr. et Nordst. Alg. exsicc. N:o 114, 316, 413. 

 Syn. Cladophora arcta Croall, Fl. Disc. p. 461. 



» « DicKiE, Alg. Sutherl. 1, p. 143; Alg. Cumberl. p. 239. 



» " GoBi, Algenfl. Weiss. Meer. p. 85. 



