492 



J. Ag., Till. Alg. Syst. 3, p. 129; Rosenv., Grønl. Havalg., p. 960; Scyto- 

 siphon compressus § crispatus Lyngb., Hydrophyt., p. 04 ex parte. 



To the present plant I have referred some specimens more or 

 less ramified and prolific, which bear a close resemblance to the 

 figure in Flora Danica tab. 763 and to Kutzing's fig. 3, tab. 30 in Tab. 

 phyc. The cells being arranged in more or less disiinct rows or 

 even without any order whatever, and the inner wall being occa- 

 sionally somewhat thickened. I have further referred to this variety 

 some qnite branchless specimens, resemblingÆ. intestinalis, \ar.genuina 

 which had, however, only a slightly thickened inner wall, and 

 were, besides, more or less closely covered with quite thin prolifi- 

 cations a few cm. in length. Specimens of this rather characteristic 

 form will be distribnted in Wittrock and Nordstedt's Algae 

 exsiccatae. 



A ramified and prolific form from Kalbakfjorden, belonging to 

 this variety, also showed distinct trabeculæ, which agreed closely 

 in essential points with Ro sen vinge 's description (1. c. p. 961). 

 These septa were, however, a great deal thinner than those in the 

 Greenland specimens, and corresponded closely with those described 

 in var. compressa. 



The specimen of Scytosiphon compressus j3 crispatus Lyngb., 

 Hydrophyt., p. 64 from »littus Eldevig, Østero,« preserved in 

 Lyngb ye's herbarium, may be referred lo this variety. And owing 

 to the more thorough knowledge acquired in examining my con- 

 siderable material of the marine Euteromorphae , I have arrived 

 at a somewhat different conclusion regarding the plant which in 

 my paper on the »Freshwater Algæ« (pp. 243—5) I have cailed 

 Euteromorpha compressa on the strength of the material gathered 

 partly by Lyngby e on Stromo, partly by Ostenfeld on Fuglo, 

 in both piaces in running streams far up on the bilis. I think it 

 now most natural to refer the specimens in question to var. prolifera, 

 but I must emphasize the faet that they, more particularly on ac- 

 count of their comparatively small cells, also remind one somewhat 

 of var. micrococca. 



Enteromorpha intestinalis, as here defined, occurs practically every- 

 where in the most different localities along the Færoese coasts, either 

 between tidemarks or in quite shallow water. But in their typical form 

 each different variety has its distinguishing habitat. Tluis, var. genuina 

 is most commonly found in high-lying tide-pools where tlic water is 

 brackish, often almost quite fresh, and even sometimes stagnant. I have 

 found il in lide pools ;it ;i height of about 80 feet above sea-level. Var. 



