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frequently occur in August; they were also met with in September, but the stichidia 
were then partly emptied and thrown off. Young stichidia were observed in June. 
Localities. Ns: Washed ashore at Römö (C. M. Poulsen); eR, 9 miles NW ‘/2 N of Lodbjerg 
lighthouse, 27 m, a small incomplete specimen 7 mm long, October. — Sk: Bragerne, 2.5 m, on Rhodo- 
mela, 4 cm, sterile, July; Dana St. 2900, east of Bragerne, 9 m, 1.5 cm high, sterile, October; washed 
ashore at Lokken (Mrs. Witthoft), 4 cm in diameter with ripe cystocarps; ZK" abreast of Rubjerg Knude, 
18 m, 4—6.5 cm high and two other places off Lønstrup, about 8.5 m, on Phyllophora membranifolia; 
repeatedly washed ashore at Lonstrup; off Hirtshals, 12 m, F. Borgesen, on Laminaria hyperborea, 
7—8 cm in diam.; Bredegrund and Mollegrund off Hirtshals, 9—15 m, several specimens, up to 7.5 cm 
high, and washed ashore at Hirtshals. 
The Botanical Museum of Copenhagen possesses two well developed specimens of Plocamium 
coccineum which according to the label were collected in Øresund by ØRSTED but are named Delesseria 
alata. These specimens originate from the herbarium of C. M. PouLsen; they were not labelled by 
ØRSTED and it cannot be imagined that this botanist should have confounded the two species in 
question. It must therefore be supposed that a confusion of the labels has taken place. Pl. coccineum 
has not otherwise been met with in the Danish waters within Skagen. At the western coast of Sweden 
it occurs at Bohuslän (Skagerak), but KJELLMAN records it with doubt from Skelderviken. 
Fam. Gracilariaceæ. 
Kyrın, 1930, p. 54. 
Gracilaria Grev. 
1. Gracilaria confervoides (L.) Greville. 
Greville, Alg. Brit. 1830, p. 123; Harvey, Phyc. Brit. I, 1846, pl. 65; J. Agardh, Sp. g. o. II pars II, 1852, 
p. 587; Thuret in Le Jolis, Liste d. Alg. de Cherb. 1863, p. 134; Thuret, Et. phyc. 1878, p. 81, 
pl.40; T. Johnson, The procarp and fruit in Gracilaria confervoides Grev., Ann. of Bot. I, 1888, p. 213, 
pl. 11; T. H. Buffham, Anther., 1893, p. 4, pl. 13, figs. 11, 12; Killian, Entwick. 1914, p. 254; 
Phillips, Origin of the cystocarp in the genus Gracilaria. Ann. of Bot. 39, 1925, p. 787; Sjöstedt, 
Florid. Studies, Lunds Univ. Arsskr. 22 no. 4, 1926, pp. 51—64; Kylin, Entwick. 1930, p. 55. 
Fucus confervoides L. Sp. plant. ed. 2, II, 1763, p. 1629. 
Gigartina confervoides Lam. Thal. 1813, p. 48; Lyngbye Tent. 1819, p. 43. 
The closely placed cylindrical fronds spring in a fairly great number from a 
fleshy flat disc. Harvey says that there is “a small disc accompanied by fibres” 
(Phyc. Brit. pl. 65, Manual, sec. edit. 1849, pl. 16), and his figure shows a “radix 
fibrosa”. Other authors mention only a dise, and I have myself not seen any fibres 
in the Danish specimens. The disc has a parenchymatous structure, being composed 
of vertical or ascending cell-rows. The cells were in summer filled with numerous 
starch-grains. The disc increases in circumference by marginal growth and may 
reach a diameter of at least 0.5 cm; it becomes slowly thicker by continued 
growth of the vertical cell-rows of which it is composed. The periodicity in the 
growth may cause a stratification; the presence of one secondary layer could be 
ascertained in an older disc examined. 
The upright cylindrical fronds reach a length of up to 32 cm, though most 
of the specimens collected scarcely exceeded 20 cm in length. The ramification is 
