tainerl a very heterogeneous assemblage of plants, including
almost every Alga which is outwardly gelatinous, and whose
inward structure exhibits a filamentous arrangement. Thus
such plants as Gloiosiphonia were included in it, as well as the
Chatophorai, and many others equally unlike each other. The
group to which the name is now restricted, is distinguished by
liaving a gelatinous frond of a definite form, filled with radiating
threads, each of which terminates at its lower extremity in a
globidar cellule. The plants thus associated have a strong affinity
together, but are not exclusively marine, several of them
inhabiting fresh water, and others growing on moist rocks.
Some of the latter have the property of secreting lime in their
tissues, if not in such a regular manner as the Corallines, in a
manner approaching to it. None of the marine species eZibit
this property.
Fig. 1. Patcbes of E i v u l a e i a n i t i d a natural size. 2 . Portion of tlie
gelatinous frond. 3. Filaments:—magnijied.
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