304 KJELLMAN, THE ALG OF THE ARCTIC SBA. 
Fam. CONFERVACEZ (Ac.) Wirrr. 
Pl. Seand. p. 16. Confervaee genuine Ac. Syst. Alg. p. XXV; gen. exel. 
Gen. Spongomorpha Kirz. 
Phyc. gener. p. 273. 
Spongomorpha spinescens Kirz. 
Spec. Alg. p. 418. 
Descr. Spongomorpha spinescens Kurz. 1. c. 
Fig. » » »! » (Tab. Phyey A. ti 975: 
Lesice. ») ” KseLum. in Wirrr. et Norpst. Alg exsice. N:o 115. 
Addition to the description of this species. It is to be added to Ktrzine’s descrip- 
tion of this species, that it forms very dense, usually perfectly spherical or flattened- 
spherical balls of light-green colour, composed of obpyramedical clusters with truncate 
tops. [The numerous curved or spiral spine-shaped branches are characteristic of this 
species, connecting together with the rhizoids the particular branchsystems and clusters 
into dense masses. 
Habitat. This is a litoral alga growing gregarious in great numbers on exposed 
coasts, attached to other algw, most often to Gigartina mamillosa, sometimes to Halo- 
saccion ramentaceum. I have collected 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 Gjesver about Lat. N. 71°. 
Locality: The Norwegian Polar Sea: Finmarken at Maasé, rather local and scarce; 
Gjesver common and abundant. 
Spongomorpha arcta (Ditiw.) Ktrz. 
Spec. Alg. p. 417. Conferva arcta Diniw. Brit. Conf. Suppl. p. 67. 
Descr. Conferva arcta ArgscH. Phyec. Scand. p. 426. 
Fig. Cladophora areta Harv. Phyc. Brit. t. 135. 
Spongomorpha arcta Kurz. Tab. Phye. 4, t. 74. 
» centralis  » » » A, t. 80. 
» cymosa » » Dy Anite a4. 
Cladophora comosa » » Dost. Wi 
» sacculifera » » By tis tell 
» stricta » » » 73, t. SO: 
» vaucheriveformis » » Oe, te wioe 
Kesice. Cladophora (Conf.) arcta ArgscH. Alg. Scand. exsice. N:o 129, 334, 335. 
Spongomorpha arcta Wirrr. et Norpst. Alg. exsicc. N:o 114, 316, 413. 
Syn. Cladophora arcta Croat, Fl. Disc. p. 461. 
» » Dickie, Alg. Sutherl. 1, p. 143; Alg. Cumberl. p. 239. 
» » Gost, Algenfl. Weiss. Meer. p. 85. 
