U2 M. Foslie. 



Exsicc. Conferva melagonium var. rupincola Aresch. 1. c. 



Chaetomorpha melagonium f. rupincola "VVittr. et Nordst. Alg. 



exsicc. Nr. 632. 

 Syn. Conferva melagonium Lyngb. Hydr. Dan. p. 148. 



The typical form is sublitoral, growing on a depth of 

 3 — 8 fathoms, f. rupincola litoral, growing in rock-pools or 

 on sand-covered rocks in the lower part of the zone. The 

 latter sometimes appears gregarious in considerable numbers, 

 and seems to prefer open coast. At East-Finmarken I on- 

 ly met with sterile specimens (in July and the earlier half 

 of August), but at West-Finmarken the plant has been col- 

 lected with zoospores at the end of May and in July. 



Distribution: Generally scattered and very scarce along 

 the whole coast, in a single place (Havningberg) abundant 

 but local (f. rupincola). The typical form only found at 

 Svaerholt. 



Chaetomorpha tortuosa (Dillw.) Kiitz. 

 Spec. Alg. p. 373; Conferva tortuosa Dillw. Brit. Conf. Syn. p. 46. 

 Descr. Conferva tortuosa Aresch. Phyc. Scand. p. 433. 



Chaetomorpha tortuosa Hauck, Meeresalg. p. 439. 

 Fig. Conferva tortuosa Aresch. Phyc. Scand. t. 3, G. 

 Chaetomorpha tortuosa Kiit. Tab. Phyc. 3, t. 51. 

 „ Callithrix Kiitz. 1. c. t. 51. 



Spongiopsis mediterranea Kutz. 1. c. t. 50. 

 Exsicc. Conferva tortuosa Aresch. Alg. Scand. exsicc. Nr. 29. 



The form of this species which appears along the coast 

 of Finmarken forms loosely entangled masses, lying loose 

 on the bottom, or floating on the surface of the water in 

 pools or lagoons between tides. It agrees pretty well with 

 the specimen distributed by A r e s c h o u g 1. c. Yet the 

 colour is a little paler. It is hardly possible to draw any 

 limit between this form and the form described by Hauck 

 1. c, the latter being very much curled and twisted, and 

 having a dark green colour, much reminding of certain forms 



