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room xi. this genus, under the name of Tubularia 
Splachna. 
The genera Anguinaria and Tibiana are allied 
to the Tubularice , but they require to be further 
examined. 
In some genera the cells are either urceolate, 
or bell-shaped, and pedicelled ; in Campanularia , 
the stem is simple and creeping ; in Laomedia , 
it is arborescent. 
In the next group the stems are fistulous and 
branchy, but the cells are cylindrical, and placed 
in an unilateral series. In Plumularia the cells are 
placed in a continued, and in Sertularia in an 
interrupted unilateral series, whilst in Amatea 
they are disposed in a continued spiral line. 
The genera Biseriaria and Idia have two rows 
of cells, placed on one side of the stem. 
In the Sertulariadce the cells are small, sessile, 
and tooth-like, placed on the side of the 
branches. In most, as the true Sertularice , the 
cells are subalternate. The genus Idia only 
differs in the cells being placed rather more on 
one side than the other. The Dynamence are like 
the Sertularice , but the cells are nearly opposite, 
so as to be placed in pairs. In Pasythoa the 
cells are in pairs, separated from each other by 
a long stem, and in Lirizoa they are in groups 
of three, similarly separated. 
The genus Antennaaria is peculiar, for the 
cells 
