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and, especially in advanced specimens, by the contraction of
the tube at the dissepiments. It bears a far closer resemblance
to C. bangioides, but is a shorter and comparatively stouter
plant, and far less lubricous. The contents of the cells also
are more granular and dense.
It was originally discovered by Mr. W. Weston Young, a
friend of Dillwyn’s, to whom that author was indebted for the
drawings from which the plates that illustrate his work on the
British Conferva were engraved, and to whom he has dedicated
this pretty httle species.
Fig. 1. Tnft of C o n f e r v a Y o u n g a n a :— the natural size. 3. Portions of fila-
° ments in various stages. 3. Portion of a filament with a ripe sporidium:—
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