I. GOCCOGONEÆ. 

 1. CHROOCOCCACEÆ. 



I. Gloeothece Nag. 



Gloeothece confluens Nag. 



Någeli, Gatt einz. Alg. p. 58, tab. I, G. fig. 1. Lemmermann 1910 p. 48. 



S. Icel. Hafnarfjor5ur Stp.! 



Area: Eur., Afr., N. Am., Iceland (West). 



In the above-mentioned sample from Hafnarfj6r6ur a Gloeothece was 

 found the cells of which measured 6.6—10.1 /< in length and 1.9—2.2 /x 

 in thickness. Their dimensions tlius lie between what is stated as to 

 GL linearis and GI. confluens. I have decided to refer the form to G. con- 

 fluens because this is the older name; but practically it is undoubtedly 

 impossible to distinguish between the two species, which also seems to 

 have been Lemmermann's opinion (1. c). 



Tlie slieath did not colour with Chior-zinc-iodine. Unfortunately 

 I have had no exsiccata of this species at my disposal. 



De-Toni mentions (Sylloge Alg. V p. 61) that it is said to have been 

 found in Iceland by G. S. West, but I have not been able to discover 

 De-Toni's source. 



Gloeothece pupestris (Lyngb.) Bornet. 



Wittr. et Nordst. Alg. exsicc. Nr. 399. 



Palmella rupestris Lyngbye: Hydrophytologia p. 207, tab. 69 D. 



Gloeocapsa tepidariorum A. Br. in Rab. Alg. Nr. 221. 



Gloeothece tepidariorum Lagerheim 1883 p. 45, tab. I, fig. 12. 



E. Icel. Vallanes, among mosses, marshy place "^'/e 1914. Fljotsdalur, 

 dripping rock ^*^/6 1914. Sey6isfj6r5ur, among mosses in marsh (at 300 m) 

 ^=^/6 1914. 



Area: Ubiquist, Spitzbergen, Færoes. 



This species grows on rocks, walls, among mossés, on earth and in 

 similar piaces; it seems to require considerable moisture in order to 

 thrive. Presumably it may be considered as a true aérophilous alga. 

 On growing in very dry piaces its sheatli becomes more or less brownish, 

 but this stage can hardly be considered as actual spores (see belowO. 



Bornet was the first to realize that Palmella rupestris Lyngbye was 

 a Gloeothece (Wittr. et Nordst. no. 399), though the description and figure 

 in "Hydrophytologia danica" does not resemble the form in question 

 in any appreciable degree. The most conspicuous error is that every 



