268 
sometimes occur under the normal ones. — Hyaline unicellular hairs covering the 
surface of the frond have been mentioned and figured by THURET (Et. phyc. p. 96, 
pl. L, LI, fig. 1, 9, 15, 18). Their occurrence seems to be dependent upon the season, 
as I found them in specimens collected in July while they were wanting in speci- 
mens from August. 
The cortical layer consists of two or three cell-layers. It is covered by a con- 
tinuous layer of low cover cells. The cells of the central tissue are, as mentioned 
above, almost of the same length as those of the genicula (fig. 199). Lateral fusions 
take place between the cells of the cortical layer and of the 
central tissue as well. 
Adhesive discs are not seldom produced at the end of 
branches which accidentally come in contact with any solid 
body, e. g. an Alga or a shell of a bivalve. They are, as in 
Cor. officinalis, connected with the frond by a geniculum 
(fig. 198 B). 
As to the organs of reproduction and the germination, 
reference may be made to the splendid work of THuRET 
(1. c. p. 99, plates L, LI); it should only be mentioned that 
there are but two kinds of individuals, the sexual plants 
being monoecious. In the Danish waters only tetrasporangia- 
bearing plants were found. 
| The species has been met with in several places at 
the shore of the Skagerak and in the northern Kattegat. In 
i the Skagerak it occurred partly as f. corniculata or a trans- 
itional form; in Kattegat it occurred only as f. typica. It 
Fig. 199. was found growing on several Algæ, in particular Ahnfeltia 
Corallina rubens, longitudinal plicata, further Chondrus crispus, Phyllophora rubens, Deles- 
section of joint. 350:1. o . . 
seria and Corallina rubens. It grows partly in small depth, 
about 1 meter, near the coast, partly deeper, up to 23,5 m depth. It reaches a length 
of 2-3 cm or a little more. It has been met with both in summer and winter, 
with ripe tetrasporangia in June to August. 
Localities. Sk: YM!, Bragerne, 1—2 m; Lønstrup, washed ashore, partly f. corniculata, (C.H. 
Ostenfeld); Hirshals, 2m and washed ashore, partly f. corniculata. — Lf: ZY, Nissum Bredning, a small 
specimen between loose Alge. — Kn: Hirsholm, about 2m; N.E. of Hirsholm, c. 7m (C. H. Ostenfeld); 
Deget; GM, Engelskmands Banke, 6 m; TP, Tonneberg Banke, 15,5 m; FF, Trindelen, 15 m; TR, near 
Trindelen, 23,5 m; UB, east af Nordre Renner; TL and ZL! E. of Nordre Renner. 
Fam. 10. Gloiosiphoniaceæ. 
Gloiosiphonia Carmichael. 
1. Gloiosiphonia capillaris Huds. (Carm.) 
Carmichael in Berkeley, Gleanings of British Algæ, 1833, p. 45, Tab. 17 fig. 3; Harvey, Phyc. Brit. plate 
57, 1846; J. Agardh, Spec., JI, p. 161,1851; Flora Danica, tab. 2574, 1852; Ekman, Bidrag till käuned. 
