Contribution. I. 15 



Hh. lycopodioides f. typica a compacla is properly a li- 

 toral form, and occurs most commonly in the lowest part of 

 this zone, but at several places it also appears abundant a 

 few feet below extreme low-water mark. In scattered indi- 

 viduals I have met with it as far down as about 10 fathoms. 

 Best developed and most abundant it grows on somewhat 

 steep rocks on open coast, and in rock-pools between tides 

 on exposed places. It also is met with in rather sheltered 

 coves and in somewhat enclosed bays and sounds, but not 

 in the inner of the deeper fjords. 



The species grows commonly 10 — 15 cm. long, but ra- 

 ther often specimens are met with, which have a length of 

 20 — 25 cm. It probably develops reproductive organs all 

 the summer, but not richly (perhaps also in winter). I 

 have taken specimens with sporocarps and antheridia in Ju- 

 ne and July, at West Finmarken in May and June, and at 

 Nordland in the middle of February ; tetraspores in June 

 and July, at West-Finmarken besides that in May and Sep- 

 tember, and at Nordland in January. 



Distribution: Common and abundant almost everywhe- 

 re along the shore, as a rule wanting or at least scarce in 

 the inner part of the deeper bays. 



Gen. Polysiphonia Grev. 

 Fl. Edinb. p. 308, sec. J. G. Ag. Spec. Alg. 2, p. S00. 



Polysiphonia urceolata (Lightf .) Grev. 



Fl. Edinb. p. 309 ; Conferva urceolata Lightf. in Dillw. Intr. p. 82. 



f. typica. 

 Descr Polysiphonia urceolata a urceolata J. G.Ag. Spec. Alg. 2, p. 970. 

 Fig. „ „ Harv. Phyc. Brit. t. 167. 



Exsiec. , „ Aresch. Alg. Scand. exsicc. Nr. 68. 



„ „ Wyatt, Alg. Damn. Nr. 133. 



f. patens (Dillw.) J. G. Ag. 



1. c. p. 971; Conferva patens Dillw. Syn. p. 83. 



