576 
in company with various other Algæ and usually constitutes only a slight part of 
the vegetation. It was found most abundantly in the Øresund, not only in deep 
water of high salinity south of Hveen but also at smaller depths in localities with 
a much lower mean salinity (around Taarbæk Rey). 
In the Baltic Sea-its occurrence seems rather dubious. It is true that it 
has been recorded at Darsserort by REINKE and in two localities in Bm in the 
neighbourhood of Mgen; but in the two latter places it only occurred in a loose 
condition. In the one (SD) the small specimens were found in deep water on sandy 
bottom in company with several other loose Algæ; the specimens had an attach- 
ment disc, but most of them were attached to loose specimens of Furcellaria. In 
the other place (QZ), numerous long specimens were found at 7 or 8 metres’ depth 
on stony bottom in company with Fucus vesiculosus, Fuc. serratus and other attached 
Algee, but all the specimens of Rhodymenia palmata were certainly loose (fig. 571). 
Most of them had no basal portion; in some of them, to be sure, an attachment 
disc was present, but this seemed not to have been in function at the moment of 
collecting, or it was attached to a fragment of Furcellaria or a little stone only 
5 mm in diameter. The specimens were long (up to 28 cm), mostly repeatedly 
dichotomous, linear, about 5 mm broad; although collected at the end of July they 
were beset in the greater part of their length with more or less confluent dark 
spots which turned out to be sporangial sori with checked sporangial mother-cells. 
These sori occupied a much longer portion of the frond than in the normal fronds 
and often occurred on two or three consecutive frond segments. Altogether the spec- 
imens remind of the specimens growing in the Øresund, and it seems highly 
probable that they have been introduced into the Baltic Sea by storms from the 
West, when the salt bottom water overflows the threshold at Saltholm and carries 
with it the Algæ torn off by the movements of the water. They have then been 
able to vegetate for some time in the loose condition in a locality where the 
salinity is only 8—10 p. m. Several other Algæ occurring here in loose forms have 
undoubtedly the same origin. 
Localities. Not met with in Ns, Sk and Lf. — Kn: Harbour of Skagen; NV Rev, 7—9 m, 
Tyskerens Rev, Hvidstens Rev, NØ Rev at Hirsholmene; east of Græsholm, south of Hirsholm, 11 m; 
between Hirsholm and Kölpen, 7.5 m; at Deget; harbour of Frederikshavn; Tonneberg Banke 16—18 m; 
Læso Trindel 11—15 m. — Ke: ZE!, ZF, fH, Fladen, 17—22.5 m; Groves Flak 19 m (Borgesen); on 
the shore at Nakke (Lyngbye, April 1834). — Km: Gjerrild Bugt (Lyngbye, on the shore). — Ks: RL, 
near Ostindiefarer Grund, 15 m; on the shore at Tisvilde (Lyngbye) and Rorvig (E. Rostrup). — Sa: 
Vejro Sund; PG west of Hatter Rev, 8 m; GD, north point of Sejerø, 11—14 m; PE off Revsnæs, 
23.5 m. DK Bolsaxen 13—15 m; AH’, Lille Grund at Fyns Hoved, 9.5 m. — Lb: Fredericia, harbour; 
Strib, harbour; Middelfart, harbour and 15—20 m (Rasch,!); Kongebro; off Snoghøj, 15—19 m; Feno 
Sund; off Stenderup, 13—15 m. — Sb: GU, off Asnæs, 19 m; GP, at Halskov Rev, 10—11 m; UE, at 
Vresens Puller, 7 m. — Su: Hellebæk on the shore (Borgesen); Kronborg, on the shore (Nolte, C. Rosen- 
berg, Steenberg, Ørsted); PZ, east of Hveen; TF’, Staffans Flak, 12—13 m; bM, south of Hveen, 22.5 m; 
OH and bN, off Vedbæk, 10 m; east of Taarbæk Flak, 12.5 m, (S. Lund); Taarbæk Rev, 12—15 m, 
abundantly; OG", between Trekroner and Middelgrund. — Bw: Not observed by me; according to 
Reinke not met with in the western Baltic except at Darsserort at 20 metres’ depth. — Bm: On the 
