54 M. Foslte. 



Chantransia microscopica (Nag.) nob. 



Callithamnion microscopicum Nag in Kiitz. Spec. Alg. p. 640. 

 Descr. Achrochaetium microscopicum Nag. Ceram. p. 173. 

 Fig. „ „ Nag. 1. c. fig. 24—25. 



Callithamnion „ Kiitz. Tab. Phyc. 11, t. 58. 



This species appears to be considered as a distinct one. 

 From Ch. secundata it distinguishes itself most essentially by 

 its vertical threads arising from a disk consisting of one cell, 

 which is, seen from above, shaped like a ring. By Ch. secun- 

 data the threads arise from a cellular base. I have found 

 this to be constant by all the specimens I have seen, and 

 Nageli says (1. c. p. 173) that «ein mehrcelliger Discus 

 wie bei den iibrigen Arten ist nicht vorhanden». 



The present plant is litoral, growing in rock-pools epi- 

 phytic on Folysiphonia urceolata, on rather exposed places. 

 The Finmarkian specimens are smaller (50 — 100 p. long, the 

 cells 6 — 8 (x thick) and less branched than those figured by 

 Ktltzing. The hairs are also much fewer. It bears re- 

 productive organs at the end of July. 



Distribution: Only found at Kjelmo in Sydvaranger, rare. 



Fam. Hildbrandtiaceae Hauck. 



Meeresalg. p. 13. 



Gen. Hildbrandtia Kiitz. 

 Isis 1834, p. 675. 



Hildbrandtia rosea Kiitz. 



Phyc. gener. p. 38i. 

 Descr. Hildbrandtia rosea J. G. Ag. Epicr. p. 379. 

 Fig. „ „ Kiitz. Tab Phyc. 19, t. 91. 



Exsicc. „ „ Aresch. Alg. Scand. exsicc. Nr. 159. 



Litoral, growing in rock-pools or on rocks, chiefly within 

 the lower part of the zone, It seems to prefer open shore, 



