- 115 - 



In Iceland the C. rubrum is found on all the coasts where 

 Ceramium species are thriving. It seems to be common here with 

 exception of the north-coast but its development is far from being so 

 vigorous as on the coasts of the Færoes. A few specimina of the forma 

 pedicellata-virgata and of the forma p rotifer a-secundat a irregularis 

 (Pl. V, 6) have been found. All the remaining specimens belong to the 

 type forma subtypica-modißcata. Yet they are not typical repre- 

 sentatives for this type as they convey the impression that they 

 are more or less stunted (Pl. V, figs. 27 and 28), the formation of 

 organs of fructification seems not influenced. The occurrence of 

 this type on these coasts is possibly not due to the same factors 

 as in the Færoese and Danish waters but to the colder water. It 

 is interesting to note that this species near the limits of its area 

 passes into a irregular stage. 



From Greenland only some slightly developed specimens col- 

 lected by J. Vahl in June 1834 are at hand. 



The Færoes: 



The type prolif er a-secundat a \ Pl. I, fig. 5a; Pl. IV, figs 19, 20 and 22. 

 forma typica, Pl. IV, fig 19 and 20. 



Sandö: V Skaapen, 12 / 6 1895. 

 Vaagö: 4 / 6 1896. 



Strömö: Thorshavn, 8 / 6 1895; Mellem Thorsvig og Kvalvig, 3 / 7 1899, 



Thorshavn Tinganes, 4 / 6 1898; Hvidenes, Kalbakfjord, 24 / u 1897. 

 Bordö: Klaksvig, U / G 1898; Harald-Sund, 17 / G 1896. 

 Nolsö: 10 / 6 1895. 

 2 loc. ind. Feilberg & Rostrup. 



forma secimdata; PL I, fig. 5 a. 



Syderö: Tveraa, 10 / 5 1896; Frodebö, n | 5 1896. Trangisvaagfj., Gjâ ved 



Vigagerdi, 16 / 8 1895. 

 Stromö: Højvig, 24 / 6 1895; Thorshavn, 8 / 6 1895; 3 / 7 1895; Glivernes 8 / 7 ; 



Tinganes, 4 / 6 1898; Kalbakfjord, 8 / 5 1898 (in Ascophyllo). 

 Østero: Molen v. Ejde, 22 / 5 1 896. 

 Nolsö: 10 / 6 1895. 

 ßordö: Harald-Sund, 16 | 5 1896. 

 Svinö: 6 / 5 1900. 



1 ind. loc. 



forma prolifera-secundata irregularis: irregular specimens of 

 the two preceding forms; Pl. IV, fig. 22. 



Stromö: Thorshavn, 15 / 6 1895; Kalbakfjord, 4 I 7 1895; loc ind. 18 / 6 1907; 



Köllefjord, 15 / 7 1895; Sundelaget, 15 / 6 1900. 

 Svinö: »/n 1897. 

 Kolter: ca. 19 met., 19 / 6 1895. 



2 ind. loc. 8* 



