357 
Tetraspore-bearing specimens were found in April, cystocarpic 
in November. 
Rare along the coast of the Faeroes: — Kuno (H. J.); Syd: Tran- 
gisvaag (!). 
Order GIGARTINACEAE. 
CHONDRUS (Stackh.) J. G. Ag. 
14. Ch. crispus (L.) Lyngb., Hvdrophyt., 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 Corallina- belt. 
Cystocarp-bearing specimens were found in June and September. 
It does not seem to be particularly common along the coasts of 
the Faeroes, as was pointed out by Lyngbye: — »Ad littora Faeroensia 
hand frequens.« Simmons (1. c., p. 135) and Rostrup (1. c., p. 84) men¬ 
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.!), Sandegaerde (!); Ost.: Straender (!); No Is6: 
Ejde (!); Kuno (H. J.). 
GIGARTINA Stackh. 
15. G. mamillosa (Good, et Woodw.) J. Ag. Kjellm., N. I., p. 211 
(167); Sphaerococcus 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 there 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 July, August, October, November 
and December; with antheridia in June. 
This species is common along the exposed coasts of the Faeroes, 
but rarer in sheltered localities. Its common occurrence was already 
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