350 



It has been found in the sublittoral zone down to a depth of 

 25 fathoms along exposed as well as sheltered shores, and grows 

 in the shells of various animals, e. g. Modiola, Solen, Cyprina, Buc- 

 cinum, Serpula, etc. 



It is fairly common along the coasts of the Færoes and has been 

 found in the following localities: — Bord 6: Kvannesund (H. J.); Ost: 

 Strænder (H. J.); Str.: Thorshavn (!), Vestmanhavn (!), Gliversnæs (!) ; Syd. 

 Trangisvaag (H. J.). 



II. Florideae. 

 Order HELMINTHOCLADIACEAE. 

 CHANTRANSIA (Dec.) Schmitz. 

 8. C. secundata (Lyngb.) Thur. Le Jolis, Alg. mar. de Cherb., p. 106. 

 Callithamnion Dawiesii /3 secundatum Lyngb., Hydrophyt., p. 129; 

 Trentepohlia Daviesii Pringsheim, Beitråge zur Morphologie der 

 Meeres Algen (Aus den Abhandl. d. Konigl. Academie der Wissensch. 

 zu Berlin 1861, p. 351, tab. XXII, figs. 1— 6). 



Fig. 51. Chantransia secundata (Lyngb.) Thur. a, one larger plant and one quite young on Ceramium acan- 

 thonotuni ; b, young plant; c, portion of plant showing branches mostly opposite. 100: l. 1 



This small alga, first described and figured by Lyngbyc, I. c, 

 is more particularly characterized by its small basal disc, which 

 often even in young planls consists of several layers of cells, (see 

 Pringsheim's figs. 1 — 6), as well as by its secund branches, which 

 however, especially in older piants become opposite. But as statcd 

 below under Ch. virgatula, Ch. secundata comes very near to the 

 former 2 . 



It is an extremely common epiphyte on several algæ between 

 tide-marks, and often forms a close covering on the host plant. It 



1 Throughout this paper all the iigures denoting scale are approximatc, 

 '-' Since writing the ahove I found in mj* Cladophora material a few specimens 

 of the present speeies bearing tetraspores, the piants oceurred on a Cladophora 

 rupestris from Huj vig, gathered May 4th 1898. The tetraspores were ahout 21 u 

 long and 1(> u broad. 



