360 



bodies, the internal structure of which bears a remarkable resem- 



blance to Callophijllis. It is found fairly often bearing tetraspores 



and on measuring these and comparing them with the tetraspores 



of Callophijllis the former seemed somewhat smaller than the latter, 



thus: — 



The tetraspores of the Callocolax were : long. = 32— 35 f< ; lat. = 17— 19 /x 



» » » Callophijllis » » = 46—49 ^ ; » —22/i 



Piants bearing tetraspores oecurred in May, June, July. Appears to 

 be rather common. Found in the following localities: -- Str. : Thors- 

 havn (!), Arge (!), Kvivig (!) and Vestmanhavn (!); Syd: Tværaa (!). 



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 eoast, and grows attached to stones 

 and rocks, often associated with Corallina and other algæ, but 

 sometimes it occurs over fairly large areas as pure societies. Here 

 as elsewhere only sterile examples have been found. Sterrocolaæ 

 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- 

 colaæ decipiens. 



It is a rather common species of the Færoese coasts and was first 

 reported from the Færoes by Lyngbye, who writes in Hydrophyt. : — 

 »Ad insulas Færoenses, 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 Færoese specimens. 



It is rather common like Ahn/'ellia plicata. 



Order RHODOPHYLLIDACEAF. 

 CYSTOCLONIUM Kid/.. 



23. C. purpurascens (Huds.) Kutz. Kjellm., N. I., p. 202 (159); 

 Gigartina pinastroides Lyngb., Hydrophyt., p. 45. 



