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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 — John Shaqi

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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

Constant transverse axes (perpendicular to the main axis) are wanting in
  the Monaxonia (which have circular transverse sections); on the contrary
  they are differentiated in the Stauraxonia (which have polygonal
  transverse sections).
  |
  +-III. MONAXONIA.
  | Uniaxial ground-forms or centraxonia without transverse axes. The
  | transverse planes (perpendicular to the main axis) are circles.
  | |
  | +-8. _Monaxonia isopola._
  | | (Spheroids and ellipsoids; both poles of the main axis similar.)
  | |
  | | Central capsule and lattice-shell of of many #Discoidea# (lenses) and
  | | #Prunoidea# (ellipsoids), Belonaspida, &c.
  | |
  | +-9. _Monaxonia allopola._
  |   (Cone, ovoid and hemisphere; the two poles of the axis dissimilar.)
  |
  |     Central capsule and lattice-shell of many NASSELLARIA, especially
  |     the #Cyrtoidea# eradiata (Cyrtocalpida, &c.).
  |
  +-IV. STAURAXONIA.
    Pyramidal ground-forms or centraxonia with transverse axes. The
    transverse planes (perpendicular to the main axis) are either regular
    or amphithect polygons.
    |
    +-10. _Dipyramides regulares._
    | (Quadratic octahedron, or quadrilonchial forms and regular double
    | pyramids.)
    |
    |   ACANTHARIA with twenty radial spines, the four equatorial being
    |   equal. Multiradial #Discoidea# and Staurosphærida.
    |
    +-11. _Dipyramides amphithectæ._
    | (Rhombic octahedron, lentellipsoid, and amphithect double pyramids.)
    |
    |   ACANTHARIA with twenty radial spines, whose four equatorial spines
    |   are unequal but paired. Many #Larcoidea#.
    |
    +-12. _Pyramides regulares._
    | (Regular pyramids.)
    |
    |   Many NASSELLARIA (triradial and multiradial). Medusettida and
    |   Tuscarorida.
    |
    +-13. _Pyramides amphithectæ._
      (Rhombic pyramids.)

        #Phæoconchia#. Bipedal #Spyroidea# and #Stephoidea#.

  III. CENTROPLANA.
  The geometrical centre of the body is a plane (the sagittal plane).
  Constant transverse axes (perpendicular to the main axis) are wanting in
  the Monaxonia (which have circular transverse sections); on the contrary
  they are differentiated in the Stauraxonia (which have polygonal
  transverse sections).
  |
  +-V. BILATERALIA (or ZEUGITA).
    Bilateral forms in the general sense, with right and left halves.
    |
    +-14. _Amphipleura_
    | (Bilaterally radial ground-form.)
    |
    |   Many #Cyrtoidea# and #Spyroidea# multiradiata.
    |
    +-15. _Zygopleura._
      (Bilaterally symmetrical ground-form.)

        Most NASSELLARIA (primitively at least), many Challengerida.

  IV. ACENTRA.
  There is no geometrical centre.
  |
  +-VI. ANAXONIA.
    No definite axes can be determined.
    |
    +-16. _Irregularia._
      (Absolutely irregular ground-forms.)

        _Collodastrum_, _Collosphæra_, Phorticida, Soreumida.

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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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