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often mentioned in the pages of this work, who has added so
many original observations on the British Algse to the common
stock, and has been the first to notice so many new species.
More recently this plant has been gathered on the shores of
Heligoland in the Baltic, and also on the northern coasts of
France. It is nowhere very common.
Fiir 1. M e s o g l o ia G r i e f i t i i s ia n a :— the natural size. 2. A portion of a
° slightly magnified. 3. One of the colourless fibres. 4. Transverse
section of the stem. 5. A spore and one of the filaments of the
periphery;— all more or l
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IS:
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