Report on the Radiolaria Collected by H.M.S. Challenger During the Years 1873-1876, Plates / Report on the Scientific Results of the Voyage of H.M.S. Challenger During the Years 1873-76, Vol. XVIII

by Ernst Haeckel

Families Astrolophida, Litholophida, Chiastolida et Astrolonchida.

PLATE 129. Astrolophida, Litholophida, Chiastolida et Astrolonchida. Diam. Page. Fig. 1. Actinelius primordialis, n. sp., × 100 [730] The red central capsule, coloured by carmine, contains numerous intensely stained nuclei. Fig. 2. Litholophus decapristis, n. sp., × 300 [735] The conical central capsule contains numerous nuclei. The calymma exhibits on the distal end of each spine a coronet of myophriscs. Fig. 3. Chiastolus amphicopium, n. sp., × 150 [738] Sixteen diametral spines pierce the spherical, red coloured capsule. The conical sheets of the calymma bear myophriscs. Figs. 3a, 3b. Two isolated diametral spines exhibiting the peculiar spiral revolution at their central part, × 300 Fig. 4. Xiphacantha ciliata, n. sp., × 300 [761] The spherical central capsule is coloured red. The yellowish calymma envelops the radial spines completely. The polygonal network of lines, in which the radiating pseudopodia are symmetrically arranged, is partly visible. Fig. 5. Xiphacantha ciliata, n. sp., × 300 [761] The central part of the skeleton, exhibiting the central junction of the radial spines. Fig. 6. Acanthometron dolichoscion, n. sp., × 300 [743] Central capsule of a young specimen; in its upper half the peculiar kidney-shaped nucleus is visible, with its invagination; in the lower half some nucleated yellow cells are visible (intracapsular xanthellæ). These and the nucleus are stained by carmine. Fig. 7. Acanthometron dolichoscion, n. sp., × 300 [743] Cleavage of an isolated nucleus, with four buds. Fig. 8. Acanthometron dolichoscion, n. sp., × 300 [743] A central capsule with four large budding nuclei; and numerous small spherical nuclei produced by gemmation. Fig. 9. Acanthonia tetracopa, n. sp., × 400 [749] Central capsule of s young specimen, with a large, irregularly lobate nucleus. Fig. 10. Acanthonia tetracopa, n. sp., × 400 [749] An isolated nucleus, exhibiting the peculiar invagination, with its circular folds, and the connection with the flatly conical nucleolus. Fig. 11. Acanthonia tetracopa, n. sp., × 800 [749] Four flagellate spores.

PLATE 129.
Astrolophida, Litholophida, Chiastolida et Astrolonchida.
Diam.			Page.
Fig. 1. Actinelius primordialis, n. sp.,	×	100	[730]
The red central capsule, coloured by carmine, contains numerous intensely stained nuclei.
Fig. 2. Litholophus decapristis, n. sp.,	×	300	[735]
The conical central capsule contains numerous nuclei. The calymma exhibits on the distal end of each spine a coronet of myophriscs.
Fig. 3. Chiastolus amphicopium, n. sp.,	×	150	[738]
Sixteen diametral spines pierce the spherical, red coloured capsule. The conical sheets of the calymma bear myophriscs.
Figs. 3a, 3b. Two isolated diametral spines exhibiting the peculiar spiral revolution at their central part,	×	300
Fig. 4. Xiphacantha ciliata, n. sp.,	×	300	[761]
The spherical central capsule is coloured red. The yellowish calymma envelops the radial spines completely. The polygonal network of lines, in which the radiating pseudopodia are symmetrically arranged, is partly visible.
Fig. 5. Xiphacantha ciliata, n. sp.,	×	300	[761]
The central part of the skeleton, exhibiting the central junction of the radial spines.
Fig. 6. Acanthometron dolichoscion, n. sp.,	×	300	[743]
Central capsule of a young specimen; in its upper half the peculiar kidney-shaped nucleus is visible, with its invagination; in the lower half some nucleated yellow cells are visible (intracapsular xanthellæ). These and the nucleus are stained by carmine.
Fig. 7. Acanthometron dolichoscion, n. sp.,	×	300	[743]
Cleavage of an isolated nucleus, with four buds.
Fig. 8. Acanthometron dolichoscion, n. sp.,	×	300	[743]
A central capsule with four large budding nuclei; and numerous small spherical nuclei produced by gemmation.
Fig. 9. Acanthonia tetracopa, n. sp.,	×	400	[749]
Central capsule of s young specimen, with a large, irregularly lobate nucleus.
Fig. 10. Acanthonia tetracopa, n. sp.,	×	400	[749]
An isolated nucleus, exhibiting the peculiar invagination, with its circular folds, and the connection with the flatly conical nucleolus.
Fig. 11. Acanthonia tetracopa, n. sp.,	×	800	[749]
Four flagellate spores.

PLATE 130.

Legion ACANTHARIA.

Order ACANTHONIDA.

Family Astrolonchida.

PLATE 130. N.B.—The signification of the characters is the same in all the figures (compare p. [718]). a. Northern polar spines. b. Northern tropical spines. c. Equatorial spines. d. Southern tropical spines. e. Southern polar spines. Astrolonchida. Diam. Page. Fig. 1. Acanthometron bulbiferum, n. sp., × 300 [745] Fig. 2. Acanthometron cylindricum, n. sp., × 200 [743] Fig. 3. Lithophyllium gladiatum, n. sp., × 200 [754] Fig. 4. Stauracantha quadrifurca, n. sp., × 300 [764] Fig. 5. Stauracantha orthostaura, n. sp., × 200 [762] Fig. 6. Phatnacantha icosaspis, n. sp., × 400 [765] Fig. 7. Pristacantha polyodon, n. sp., × 300 [766] Fig. 8. Pristacantha dodecodon, n. sp., × 300 [766] Only the central parts and the leaf-cross. Fig. 9. Pristacantha octodon, n. sp., × 200 [765]

PLATE 130.
Astrolonchida.
Diam.			Page.
Fig. 1. Acanthometron bulbiferum, n. sp.,	×	300	[745]
Fig. 2. Acanthometron cylindricum, n. sp.,	×	200	[743]
Fig. 3. Lithophyllium gladiatum, n. sp.,	×	200	[754]
Fig. 4. Stauracantha quadrifurca, n. sp.,	×	300	[764]
Fig. 5. Stauracantha orthostaura, n. sp.,	×	200	[762]
Fig. 6. Phatnacantha icosaspis, n. sp.,	×	400	[765]
Fig. 7. Pristacantha polyodon, n. sp.,	×	300	[766]
Fig. 8. Pristacantha dodecodon, n. sp.,	×	300	[766]
Only the central parts and the leaf-cross.
Fig. 9. Pristacantha octodon, n. sp.,	×	200	[765]