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Examples

  • Probably a near relative of the Pemmatodiscus is the Kunstleria

    The Evolution of Man — Volume 2 Ernst Heinrich Philipp August Haeckel 1876

  • Pemmatodiscus gastrulaceus (Monticelli), in longitudinal section.

    The Evolution of Man — Volume 2 Ernst Heinrich Philipp August Haeckel 1876

  • Pemmatodiscus propagates asexually, by simple longitudinal cleavage; on this account it has recently been regarded as the representative of

    The Evolution of Man — Volume 2 Ernst Heinrich Philipp August Haeckel 1876

  • Pemmatodiscus (Figure 2.233, 1) is sometimes rather flat, and shaped like a hat or cone, at other times almost curved into a semi-circle.

    The Evolution of Man — Volume 2 Ernst Heinrich Philipp August Haeckel 1876

  • Pemmatodiscus and Kunstleria may be included in the family of the

    The Evolution of Man — Volume 2 Ernst Heinrich Philipp August Haeckel 1876

  • Gastraeads, that the gut remains permanently in the very simple form in which we find it transitorily in the palingenetic gastrula of the other animals; it is thus in the Gastremaria (Pemmatodiscus), the

    The Evolution of Man — Volume 2 Ernst Heinrich Philipp August Haeckel 1876

  • Pemmatodiscus gastrulaceus, which Monticelli discovered in the umbrella of a large medusa (Pilema pulmo) in 1895; the convex surface of this gelatinous umbrella was covered with numbers of clear vesicles, of 1/25 to 1/8 inch in diameter, in the fluid contents of which the little parasites were swimming.

    The Evolution of Man — Volume 2 Ernst Heinrich Philipp August Haeckel 1876

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