. Botanisk tidsskrift. Botany; Plants; Plants. — 163 - on Ptilota and Laminaria digitata down to a depth of 10 fathoms. It has been gathered with unilocular sporangia in May—June and with plurilocular sporangia in June. In his List of the marine Algæ of Berwick-on-Tweed *) p. 58 Batters mentions the plurilocular sporangia of this species, saying: „In the present genus the plurilocular sporangia are formed in the continuity of the branches", but he gives no further particulars. Reinke supposes (I.e.) that Fosliea curta (Pylaiella curta Fosl.) is identic with Isthmoplea sphærophora with plu

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. Botanisk tidsskrift. Botany; Plants; Plants. — 163 - on Ptilota and Laminaria digitata down to a depth of 10 fathoms. It has been gathered with unilocular sporangia in May—June and with plurilocular sporangia in June. In his List of the marine Algæ of Berwick-on-Tweed *) p. 58 Batters mentions the plurilocular sporangia of this species, saying: „In the present genus the plurilocular sporangia are formed in the continuity of the branches", but he gives no further particulars. Reinke supposes (I.e.) that Fosliea curta (Pylaiella curta Fosl.) is identic with Isthmoplea sphærophora with plurilocular sporangia, and points out the great resem- blence of these two species. I have in SW. Iceland and S. Iceland met with specimens having plurilocular sporangia. These plants are fully agreeing with Fosliea curta (Fosl.) Rke. according to Foslie's description, figures (1. c.) and original specimens here at the Botanical Museum. 1 have no doubt at all that the specimens in question belong to Isthmoplea sphærophora, as they precisely agree with the plants bearing unilocular sporangia in every- thing except that they have plurilocular sporangia. The size of the plants is the same, the thickness of the filaments is nearly the same, the ramifica- tion, the structure of the frond and the shape of chromato- phores are the same. Conse- quently Fosliea curta must be regarded as identical with Isth- moplea sphærophora. Reinke. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original work.. Botaniske forening i København. København : H. Hagerups Forlag