98 M. £osiie. 



zoosporangia and gametangia at the end of May. The zoo- 

 sporangia are situated as the gametangia, on different indi- 

 viduals, mostly obovate, 42 — 60 fx long and 28 — 36 jx broad. 

 Distribution: Only found at Bugonaes in Sydvaranger, 

 very rare. 



Fam. Punctariacese (Thur.) Kjellm. 



PI. Scand. p. 9; Thur. in Le Jol. Liste Alg. Cherb. p. 14; lim. mut. 



Gen. Desmotrichum Ktitz. 

 Phyc. germ. p. 244. 



Desmotrichum undulatum (J. G. Ag.) Rke. 

 Ostseefl. p. 55; Punctaria undulata J. G. Ag. Nov. p. 15, sec. Spec. 

 Alg. 1, p. 72. 

 Descr. Desmotrichum undulatum Rke 1. c. p. 57. 



Punctaria undulata J. G. Ag. Spec. Alg. 1, p. 72. 

 Fig. Desmotrichum undulatum Rke. Atlas t. 11. 



„ tenuissimum Kiitz. Tab. Phyc. 6, t. 44. 



Exsicc. Punctaria undulata Aresch. Alg. Scand. exsicc. No. 90. 

 Syn. Ulva plantaginifolia Lyngb. Hydr. Dan. p. 31. 



I found, in the middle of June, some young and barren 

 specimens of an alga, which I think are to be referred to 

 this species. They grew in a rock-pool in the lower part 

 of the litoral zone, fastened to Ceramium rubrum, in a so- 

 mewhat exposed locality. 



Distribution: Only found at Kjollefjord, very rare. 



Gen. Punctaria Grev. 

 Alg. Brit. p. XLH. 



Punctaria plantaginea (Roth) Grev. 

 1. c. p. 53; Ulva plantaginea Roth, Cat. Bot. 2, p. 243. 



f. 



