BY H.M.S. CHALLENGER DURING THE YEARS 1873-1876, PLATES***


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REPORT ON THE SCIENTIFIC RESULTS OF THE VOYAGE OF H.M.S. CHALLENGER
DURING THE YEARS 1873-76

Under the Command of Captain George S. Nares, R.N., F.R.S.
and the Late Captain Frank Tourle Thomson, R.N.

Prepared Under the Superintendence of
the Late Sir C. Wyville Thomson, KNT., F.R.S., &c.
Regius Professor of Natural History in the University of Edinburgh
Director of the Civilian Scientific Staff on Board
and Now of
John Murray
One of the Naturalists of the Expedition

ZOOLOGY--VOL. XVIII.

PLATES

Published by Order of Her Majesty's Government







Printed for Her Majesty's Stationary Office
and Sold by
London:--Eyre & Spottiswoode, East Harding Street, Fetter Lane
Edinburgh:--Adam & Charles Black
Dublin:--Hodges, Figgis, & Co.
1887

Price (in Two Parts, with a Volume of Plates) L5, 10s.




CONTENTS.


REPORT on the RADIOLARIA collected by H.M.S. CHALLENGER during the years
1873-1876.

By ERNST HAECKEL, M.D., Ph.D., Professor of Zoology in the University of
Jena.

PLATES.




CONTENTS.


  PLATES   1-50. SPUMELLARIA.
    "     51-98. NASSELLARIA.
    "    99-128. PHAEODARIA.
    "   129-140. ACANTHARIA.
  MAP, SHOWING THE GEOGRAPHICAL DISTRIBUTION OF THE RADIOLARIA.



PLATE 1.

LEGION SPUMELLARIA.

Order COLLOIDEA.

Family THALASSICOLLIDA.

  Fig. 1. _Actissa princeps_, n. sp.,                           x 300    13

  The entire living Spumellarium. _c_, The spherical central
      capsule containing finely granulated protoplasm, which
      is radially striated in the cortical zone; _v_,
      spherical vacuoles enclosed by the protoplasm; _n_, the
      spherical nucleus in the centre; _l_, the concentric
      nucleolus; _f_, the radial pseudopodia which pierce the
      calymma or the (yellowish) jelly-envelope of the
      central capsule and arise from the granular
      sarcomatrix.

  Fig. 1_a_. Half of the central capsule of another specimen,
      in which the original central nucleus is cleft into
      numerous small nuclei,                                    x 400

  Fig. 1_b_. Half of the central capsule of another specimen,
      filled up by flagellate spores,                           x 400

  Fig. 1_c_. Eight isolated flagellate spores,                  x 800

  Fig. 2. _Thalassolampe maxima_, n. sp.,                       x   8    17

  The entire living Spumellarium. _c_, The big spherical
      central capsule; _a_, the large alveoles filling the
      central capsule and surrounding a central nucleus; _f_,
      the pseudopodia piercing the extracapsular calymma.

  Fig. 2_a_. The nucleus alone, with numerous nucleoli,         x  30

  Fig. 3. _Thalassopila cladococcus_, n. sp.,                   x  20    17

  _c_, The big central capsule; _a_, numerous large alveoles
      contained in the central capsule; _k_, oil globules,
      many of which are placed in the radially striped
      cortical zone; the nucleus placed centrally, is covered
      with numerous radial apophyses or caecal sacs. _f_, The
      radially striped calymma.

  Fig. 4. _Thalassicolla maculata_, n. sp.,                     x 100    21

  _c_, The central capsule; _v_, vacuoles filling this
      capsule; _n_, the central nucleus; _l_, the concentric
      nucleolus; _g_, the voluminous calymma, a small radial
      piece of which is only represented; _a_, the large
      alveoles; _b_, peculiar exoplasmatic bodies; _p_, black
      pigment in the inner zone; _f_, the retracted
      pseudopodia in the outer zone.

  Fig. 4_a_. An exoplasmatic body,                              x 300

  Fig. 4_b_, Vacuoles in the endoplasm,                         x 300

  Fig. 5. _Thalassicolla melacapsa_, n. sp.,                    x 300    21

  _n_, The large nucleus; _l_, numerous small nucleoli inside
      the nucleus; _v_, the vacuoles filling up the central
      capsule and separated by black pigment; _a_, large
      alveoles in the calymma; _k_, oil globules; _b_,
      exoplasmatic bodies; _f_, the retracted pseudopodia in
      the outer zone of the calymma.

  Fig. 5_a_. An endoplasmatic vacuole, resembling a cell,       x 600

  Fig. 5_b_. A piece of the central capsule,                    x 600

[Illustration: 1. ACTISSA. 2. THALASSOLAMPE. 3. THALASSOPILA. 4. 5.
THALASSOCOLLA.]



PLATE 2.

LEGION SPUMELLARIA.

Order BELOIDEA.

Family THALASSOSPHAERIDA.

  Fig. 1. _Lampoxanthium pandora_, n. sp.,                      x 120    38

  The central capsule exhibits distinct pore-canals in its
      membrane, and a clear interval between this and the
      coagulated and vacuolated protoplasm. The central
      nucleus contains numerous dark nucle