Sentence Examples


  • Cavity of the zooecium subdivided by transverse diaphragms, most numerous in the distal portion.
  • This view depended principally on the fact that the life of the polypide and of the zooecium are not coextensive.
  • It is one of the most remarkable facts in the natural history of the Polyzoa that a single zooecium may be tenanted by several polypides, which successively degenerate.
  • In a few Gymnolaemata the ectocyst is merely chitinous, although in most cases the four vertical walls and the basal wall of the zooecium are calcareous.
  • 8 A, 9 A), but in many Cheilostomes the frontal surface is protected by a calcareous shield, which grows from near the free edges of the vertical walls and commonly increases in thickness as the zooecium grows older by the activity of the "epitheca," a layer of living tissue outside it.

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