360 
bodies, the internal structure of which bears a remarkable resem¬ 
blance to Cctllophyllis. It is found fairly often bearing tetraspores 
and on measuring these and comparing them with the tetraspores 
of Callophyllis the former seemed somewhat smaller than the latter, 
thus: — 
The tetraspores of the Callocolax were: long. = 32—35 y ; lat. = 17—19 ^ 
» » » » Callophyllis » » = 46—49 y\ » = 22 a 
Plants bearing tetraspores occurred in May, June, July. Appears to 
be rather common. Found in the following localities: — Str.: Thors- 
havn (!), Arge (!), Kvivig (!) and Vestmanhavn (!); Syd: Tvaeraa (!). 
AHNFELTIA Fries. 
21. A. plicata (Huds.) Fr. Kjellm., N. I., p. 210 (166); Gigartina 
plicata Lyngb., 1. c. p. 42. 
It has been met with both in the littoral zone in rock pools 
near low water mark, and in the sublittoral in shallow water. It 
prefers a somewhat sheltered coast, and grows attached to stones 
and rocks, often associated with Corallina and other algae, but 
sometimes it occurs over fairly large areas as pure societies. Here 
as elsewhere only sterile examples have been found. Sterrocolax 
decipiens Schmitz is a common parasite on the present species and 
forms small cushion-like growths on it; and in Lyngbye’s Her¬ 
barium there are specimens from Eide densely covered with Sterro¬ 
colax decipiens. 
It is a rather common species of the Faeroese coasts and was first 
reported from the Faeroes by Lyngbye, who writes in Hydrophyt.: — 
»Ad insulas Faeroenses, rarius.« 
STERROCOLAX Schmitz. 
22. S. decipiens Schmitz, Die Gattung Actinococcus Kiitz., Flora 
1893, p. 367. 
Appears to be a fairly common parasite on Ahnfeltia plicata 
and consequently occurs in localities similar to those of the latter. 
The only reproductive organs it has been known to bear are mono¬ 
spores. The latter occur also on the Faeroese specimens. 
It is rather common like Ahnfeltia plicata. 
Order RHODOPHYLLIDACEAE. 
CYSTOCLONIUM Kiitz. 
23. C. purpurascens (Huds.) Kiitz. Kjellm., N. I., p. 202 (159); 
Gigartina pinastroides Lyngb., Hydrophyt., p. 45. 
