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Report on the Radiolaria Collected by H.M.S. Challenger During the Years 1873-1876, First Part: Porulosa (Spumellaria and Acantharia): Report on the Scientific Results of the Voyage of H.M.S. Challenger During the Years 1873-76, Vol. XVIIIHaeckel, Ernst

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Report on the Radiolaria Collected by H.M.S. Challenger During the Years 1873-1876, First Part: Porulosa (Spumellaria and Acantharia): Report on the Scientific Results of the Voyage of H.M.S. Challenger During the Years 1873-76, Vol. XVIII

Name: Report on the Radiolaria Collected by H.M.S. Challenger During the Years 1873-1876, First Part: Porulosa (Spumellaria and Acantharia): Report on the Scientific Results of the Voyage of H.M.S. Challenger During the Years 1873-76, Vol. XVIII
Author: Haeckel, Ernst

Haeckel, Ernst

Radiolaria

_a._ Among the SPUMELLARIA, _Actiprunum_ (p. 14), _Colloprunum_ (p. 25,
    Pl. 3, fig. 9), most #Prunoidea# (p. 288).

    _b._ Among the ACANTHARIA, many Amphilonchida (p. 782, Pl. 132, figs.
    2, 6), and Belonaspida (p. 861).

    _c._ Among the NASSELLARIA, many #Plectoidea# (p. 905, Pl. 91, figs. 5,
    9), #Stephoidea# (p. 937, Pl. 81, fig. 16), Monocyrtida (Pl. 51, fig.
    3), &c.

  B. _The Cylindrical Central Capsule_, with considerable elongation of the
  vertical main axis, which is several times as long as the horizontal
  transverse axis.

    _a._  Amongst the SPUMELLARIA, _Collophidium_ (p. 26, Pl. 3, figs. 1-3)
    and many #Prunoidea# (_Spongurus_, &c.).

    _b._  Among the ACANTHARIA, some Amphilonchida.

  C. _The Discoidal, Spheroidal, or Lenticular Central Capsule_, with one
  axis shorter than the others, which becomes the vertical main axis.

    _a._ Among the SPUMELLARIA, _Actidiscus_ (p. 15), _Collodiscus_ (p.
    27), and the large group #Discoidea# (p. 408).

    _b._ Among the ACANTHARIA, many Quadrilonchida (p. 768, Pl. 131), and
    most Hexalaspida (p. 874).

    _c._ Among the NASSELLARIA, certain #Stephoidea# and #Cyrtoidea#.

    _d._ Among the great legion PHÆODARIA the spheroidal central capsule is
    almost always more or less flattened in the direction of the main axis
    (p. 1525, Pls. 101-128).

  D. _The Lentelliptical Central Capsule_ (or triaxial ellipsoid), with
  three unequal but isopolar axes at right angles to each other, the
  sections in all three dimensions of space being ellipses.

    _a._ Among the SPUMELLARIA, _Actilarcus_ and the large group
    #Larcoidea# (p. 604).

    _b._ Among the ACANTHARIA, certain Amphilonchida and Belonaspida.

  E. _The Polymorphic, Amoeboid or Irregular Central Capsule._

    _a._ Among the SPUMELLARIA, _Collodastrum_ (p. 28, Pl. 3, figs. 4, 5),
    and some #Larcoidea#.


55. _The Exometamorphic Forms of the Central Capsule._--The secondary forms
of the central capsule, which are brought about by external causes, chiefly
dependent on the formation of the skeleton, are very various and in many
cases devoid of special interest; in other instances, on the contrary, they
are of great importance, because of the clear relation of cause and effect
which can be traced between the development of the skeleton and of the
capsule. The most important phenomena to be recorded in this connection are
as follows:--

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Report on the Radiolaria Collected by H.M.S. Challenger During the Years 1873-1876, First Part: Porulosa (Spumellaria and Acantharia): Report on the Scientific Results of the Voyage of H.M.S. Challenger During the Years 1873-76, Vol. XVIII

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