Whether the Acalephe or Zoophyta are highest in the scale, we do
not intend to indicate above. The young of some zoophytes are
acalephs in form, even to organs of sight, and the young of some
acalephs are much like polyps: moreover, the adult acaleph is often
quite analogous in its radiately subdividing alimentary channels, to
the same in the Fungia.
Through the Bryozoa, the infusoria are connected with the 'Tuni-
cata and the other Molluscs; and through the Rotifera and Entozoa,
they connect with the Articulata, thus passing each way, out of the
true Radiate type, into that which characterizes the higher sub-
kingdoms. The Bryozoa, Rotifera, and Entozoa, may be arranged
in the sub-kingdom Radiata, or with the Mollusca and Articulata,
whose types of structure they exhibit, though under a Radiate form.
The Echinoderms, although so strikingly peculiar in some species,
—the Echini,—yet, through the Holothuriew, bear closely upon the
Articulata; while the Acalephs incline toward the Mollusca.
