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CLASSIFICATIONS OF ZOOPHYTES. 
Hippothoa. 
Alecto. 
A A. Substance flexible. — Flustradje. 
Farcimia. 
Flustra. 
III. Thecata. 
Polypi surrounded by a membranaceous tube, covering 
THE SUBDIVISIONS OF THEIR COMPOUND BODY. 
A. Sheath slightly calcareous ; cells single , or in rows. 
I. Sheath slightly calcareous, cells enlarged, in rows, united or 
single. — Cell a ri adje. 
a. Cells united. 
b. Cells with the orifices opening on the upper surface. 
Cel lu 1 aria. 
Tricellaria. 
Crisia. 
b b. Cells in pairs, attached by the back, the orifices 
with opposite aspects. 
Notamia. 
a a. Cells single. 
Eucratia. 
Anguinaria. 
A A. Sheath membranaceous , cells enlarged externally and lateral. 
. — Sf.rtulariadje. 
I. Base of the cells broad, coalescing with the stem, 
a. Cells on opposite sides of the stem. 
Sertularia. 
Dynamena. 
Thuiaria. 
a a. Cells unilateral. 
Antennularia. 
Plumularia. 
Serialaria. 
II. Base of the cells narrow, or pedunculated. 
Campanularia. 
Valkeria. 
Cymodocia. 
AAA. Sheath membranaceous ; the cells are the simple extremities 
of the branches — Tubulariad^e. 
Tubularia. 
Plumatella. 
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