. Dansk botanisk arkiv. Plants; Plants -- Denmark. F. Børgesen: Rhodophyceæ of the Danish W. Indies. 323. Fig. 325. Dasya ocellata (Gratel.) Harv. Apex of plant. (About 350:1). about 15 \x thick. At the summit of the main filaments the ramuh are bent upwards covering the growing point entirely. The cortical layer is highly developed, covering the stems quite densely from base to summit. The specimens found form dense dark red-brown tufts about 4 cm high or even - ^^ '^'^ l\r^ l\/n /) more. They are richly ramified and on the whole vigorously de- veloped. The breadth of the branch-system with t
. Dansk botanisk arkiv. Plants; Plants -- Denmark. F. Børgesen: Rhodophyceæ of the Danish W. Indies. 323. Fig. 325. Dasya ocellata (Gratel.) Harv. Apex of plant. (About 350:1). about 15 \x thick. At the summit of the main filaments the ramuh are bent upwards covering the growing point entirely. The cortical layer is highly developed, covering the stems quite densely from base to summit. The specimens found form dense dark red-brown tufts about 4 cm high or even - ^^ '^'^ l\r^ l\/n /) more. They are richly ramified and on the whole vigorously de- veloped. The breadth of the branch-system with the covering ra- muli is nearly a half cm. The stichidia are cylindrical to conical, running out in a shorter or longer sterile point. The stalk is composed of 1 to 7 or more cells. Dasija ocellata was found growing upon the roots of the mang- roves to which it is fastened by means of a small disc. It was growing in a sheltered locality and in shallow water. It had tetrasporangia in the month of January. Only found once, St. Thomas: Bovoni Lagoon. Geogr. DJstrib.: Bermuda, Mediterranean Sea, Morocco, warmer parts of the European Atlantic coast. 5. Dasya corymbifera J. Ag. J. Agardh, In Historiam Alg. Symbolæ (Linnæa, vol. 16, 1841, p. 31); Spec. Alg., vol. II, p. Ill, p. 1219. Crouan, Fl. Finistére, p. 159. Zanar- DiNi, Phyc. , vol. II, pi. 59. Dasya orbuscula var. mucilaginosum Grn., Alg. mar. Finistére, No. 286. Dasya venusta Harv., Phyc. Brit., pi. 225. The specimens reach a heigth of about ö—7 cm. They have 5 pericentral cells; the cortex is not much developed, the central cells being clearly seen through it. The ramuli are monosiphonous with thicker, 50—60 |u thick, cells at their base, thinner upwards, becom- ing very slender at their summit. The branches of the ramuli are spreading in all directions. Tetrasporic plants were the only ones found. The stichidia are developed on the summit of a branch in the ramuli. They have gene- 21*. Plea
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