357 



Tetraspore-bearing specimens were found in April, cystocarpic 

 in November. 



Rare along the coast of the Færoes: -- Kuno (H. J.); Syd: Tran- 

 gisvaag (!). 



Order GIGARTINACEAE. 



CHONDRUS (Stackh.) J. G. Ag. 



14. Ch. crispus (L.) Lyngb., Hydrophyt., p. 15; Kjellm. , N. I., 



p. 212 (167). 



This alga is found both in the littoral zone near low-water 

 mark, where it also occurs in rock pools, and in the sublittoral 

 in shallow water. It is met with on fairly exposed coasts as well 

 as in more sheltered localities, and grows on rocks and stones, often 

 in the Coro///no-belt. 



Cystocarp-bearing specimens were found in June and September. 



It does not seem to be particularly common along the coasts of 

 the Færoes, as was pointed out by Lyngby e: — »Ad littora Færoensia 

 haud frequens.« Si mm o ns (1. c, p. 135) and Rostrup (Le., p. 84) raen- 

 tion it as »fairly common«, but they do not give its habitats. In the 

 collections which I have had at my disposal are specimens from: — Str. : 

 Thorshavn (Lyngb., H. J.!), Sandegærde (!); Ost.: Strænder(!); Nolso: 

 Ejde(!); Kuno (H. J.). 



GIGARTINA Stackh. 



15. G. mamillosa (Good. et Woodw.) J. Ag. Kjellm., N. I., p. 211 

 (167); Sphærococcus mamillosus Lyngb., Hydrophyt., p. 14. 



This is a littoral species and grows gregariously near low-water 

 mark; it prefers exposed coasts and grows most luxuriantly at the 

 most exposed stations. Found attached to gently inclined as well 

 as almost vertical rock faces, and prefers to be left dry by the 

 tide for a time. Occurs seldom in rock-pools and then does not 

 seem to thrive. On the exposed coast north of the redoubt of 

 Thorshavn I found it here and Ihere in rock -pools at half-tide 

 level, mostly forming low, round cushions hardly an inch high. 

 At a higher level it hardly ever occurs in rock-pools, but I have 

 come across a few specimens from pools, which were thinner than 

 customary and more irregularly branched. 



Found with cystocarps in Julv, August, October, November 



and December; with antheridia in June. 



This species is common along the exposed coasts of the Færoes. 

 but rarer in sheltered localities. Its common occurrence was already 



23* 



