protected localities. It occurs most abundantly and most well developed in the Lim- 
fjord, undoubtedly owing to the high salinity and the high summer temperature; 
in some stony reefs in the Logstor Bredning it was found to be the characterising 
species. The specimens growing in very sunny localities are yellow, owing to yellow 
cell-sap in the outer cortical cells, while the specimens growing in shady places 
are red-brown. 
Localities. — Sk: Norre Lyngby north of Lokken, washed ashore (Ove Paulsen); Hirshals, on 
stones west of the mole, under Fucus vesic. and serr., and on Fue. serr. (fig. 338 B). — Lf: ZS, Nissum 
Bredning, off Kobbergd, Ronnen and Sondre Ron by Lemvig; Malle (J. P. Jacobsen) and MG, off Hanklit 
in Thisted Bredning; Sallingsund, east side of Grodde by Nykøbing and further north and south of 
Nykøbing; off Gronnerup; Knudshoved, Fur; off Lisehoj north coast of Fur; Ejerslev Ron, Amtoft Rev, 
Holmtunge Hage and Lendrup Ren in Logstor Bredning. — Kn: Hirsholm (Hornemann, !) Kélpen, Deget 
and Busserev by Frederikshavn; Nordre Renner; UB and ZL south-east of Nordre Ronner, 6,5 met.; 
stony reef by Jegens Odde. — Km: ZC, Kobbergrund, 4—4,5 m; Boels Rev between Randers Fjord and 
Mariager Fjord. — Sa: Ronnen in Begtrup Vig; Kalo Rev; Hofmansgave (Lyngbye, Hofm. Bang, Car. 
Rosenberg). 
Chondria Agardh (Harvey). 
1. Chondria dasyphylla (Woodw.) Agardh. 
C. A. Agardh, Spec. Algar. Vol. I pars post. 1822, p. 350; Falkenberg, 1901, p. 197, Taf. 22, figs. 4—18. 
Fucus dasyphyllus Woodward, Trans. Linn. Soc. Vol. 2, 1794, p. 239 tab. 23. 
Laurencia dasyphylla Greville, Alg. Brit., 1830, p. 112, pl. 14, figs. 13—17; Harvey Manual, 1841, p. 70, 
Phye. Brit. II, 1849, pl. 152; Kützing, Phye. gener. 1843, Taf. 55 II, Tab. phye. 15. Band, 1861, 
Tab. 43. 
Chondriopsis dasyphylla J. Agardh, 1863, p. 809. 
The morphology of the frond and of the reproductive organs have been 
exhaustively treated by FALKENBERG to whose work reference may be made. The 
plant forms tufts, several erect shoots issuing from the base; these shoots are 10— 
11 cm high. It was found growing near land in a depth of 1 meter or a little 
deeper. All the 29 specimens collected by me in August bore ripe tetrasporangia. One 
specimen only collected by J. P. JACOBSEN bore cystocarps. 
Localities. Ns: “Vesterhavet ved Thy” (J. P. Jacobsen). — Sk: Lokken, washed ashore; Hirs- 
hals, on stones east of the mole, in company with Gracilaria confervoides, Polysiphonia nigrescens, 
Ceramium rubrum a. 0.; west side of Hirshals, August. 
Polysiphonia Greville. 
1. Polysiphonia ureeolata (Dillw.) Grev. 
Greville, Flora Edinensis 1824 p. 309; Harvey Phye. Brit. II, 1849 pl. 167; J. Agardh 1863 p. 970; Kützing 
Tab. phye. Bd. 13 1863 Taf. 92; Kolderup Rosenvinge 1884 p. 24 (rés. p. 4) fig. 32; Buffham 1893 
p- 298; Falkenberg 1901 p.150; Kolderup Rosenvinge 1902 p. 347 pl. VI figs. 3—14; id. 1903 
p. 449 figs. 2—3; Kylin 1907 p. 139; F. Tobler, Weitere Beitr. z. K. d. Florideenkeimlinge. Beih. z. 
Bot. Centralbl. Bd. 21 Abt. 1, 1917 Taf. 7 figs. 15 —20. 
