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

Order BELOIDEA.

Family Thalassosphærida.

PLATE 2. Thalassosphærida. Diam. Page. Fig. 1. Lampoxanthium pandora, n. sp., × 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 nucleoli. The spicula are scattered throughout the alveolate calymma. Fig. 2. Thalassoplancta brevispicula, n. sp. (vel Lampoxanthium brevispiculum), × 120 [36] The central capsule contains numerous clear vacuoles, and in the cortical zone a layer of large oil-globules. The central nucleus includes numerous dark nucleoli. The calymma is alveolate. The spicula lie only in the cortical zone. Fig. 3. Thalassoxanthium cervicorne, n. sp., × 300 [33] The central capsule is filled up by clear vacuoles and contains a large central nucleus, with a single nucleolus. The spicula surround the thin calymma. Fig. 4. Thalassoxanthium cervicorne, n. sp., × 600 [33] A single spiculum. Fig. 5. Thalassoxanthium medusinum, n. sp., × 120 [32] The central capsule is filled up by clear vacuoles and contains on its cortical zone a layer of large oil-globules. The central nucleus contains numerous dark nucleoli. The calymma is radially striped, contains numerous small xanthellæ, and is surrounded by the spicula. Fig. 6. Thalassoxanthium octoceras, n. sp., × 400 [34] Three isolated spicula.

PLATE 2.
Thalassosphærida.
Diam.			Page.
Fig. 1. Lampoxanthium pandora, n. sp.,	×	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 nucleoli. The spicula are scattered throughout the alveolate calymma.
Fig. 2. Thalassoplancta brevispicula, n. sp. (vel Lampoxanthium brevispiculum),	×	120	[36]
The central capsule contains numerous clear vacuoles, and in the cortical zone a layer of large oil-globules. The central nucleus includes numerous dark nucleoli. The calymma is alveolate. The spicula lie only in the cortical zone.
Fig. 3. Thalassoxanthium cervicorne, n. sp.,	×	300	[33]
The central capsule is filled up by clear vacuoles and contains a large central nucleus, with a single nucleolus. The spicula surround the thin calymma.
Fig. 4. Thalassoxanthium cervicorne, n. sp.,	×	600	[33]
A single spiculum.
Fig. 5. Thalassoxanthium medusinum, n. sp.,	×	120	[32]
The central capsule is filled up by clear vacuoles and contains on its cortical zone a layer of large oil-globules. The central nucleus contains numerous dark nucleoli. The calymma is radially striped, contains numerous small xanthellæ, and is surrounded by the spicula.
Fig. 6. Thalassoxanthium octoceras, n. sp.,	×	400	[34]
Three isolated spicula.

PLATE 3.

Legion SPUMELLARIA.

Order COLLOIDEA.

Family Collozoida.

PLATE 3. Collozoida. Diam. Page. Fig. 1. Collozoum serpentinum, n sp (vel Collophidium serpentinum, Hkl), × 10 [26] A living cœnobium, with expanded pseudopodia. The spherical calymma (or the common jelly-mass of the colony) is alveolate and contains numerous cylindrical, serpentine, central capsules. Numerous yellow cells or xanthellæ are scattered between the radial pseudopodia in the periphery. Fig. 2. Collozoum serpentinum, n. sp., × 50 [26] An isolated, cylindrical, worm-shaped, central capsule, with an axial series of oil-globules; the red points are nuclei. Fig. 3. Collozoum serpentinum, n. sp., × 150 [26] An isolated, cylindrical, serpentine, central capsule. k, Oil-globules forming an axial series; n, densely placed, red-coloured nuclei;, c, the capsule membrane under which are scattered small black pigment spots in the colourless cortical zone of the endoplasm; a, extracapsular alveoles; x, xanthellæ or "yellow cells." Fig. 4. Collozoum amœboides, n. sp., × 100 [28] A spherical cœnobium or jelly-colony. Each amœboid central capsule contains an oil-globule; the small red points are nuclei. Fig. 5. Collozoum amœboides, n. sp., × 400 [28] c, A single isolated central capsule; n, nuclei; k, oil-globule. Fig. 6. Collozoum vermiforme, n. sp., × 30 [27] g, A spherical cœnobium or jelly-colony; a, large alveoles, forming a cortical zone; c, central capsules; k, oil-globules. Fig. 7. Collozoum vermiforme, n. sp., × 100 [27] c, A single isolated central capsule; x, xanthellæ surrounding this central capsule; k, oil-globules; n, nuclei. Fig. 8. Collozoum ellipsoides, n. sp., × 2 [26] A spherical colony; the red points are central capsules. Fig. 9. Collozoum ellipsoides, n. sp., × 150 [26] c, A single isolated central capsule; k, oil-globules; n, nuclei. Fig. 10. Collozoum inerme, Hkl., × 2 [25] An old, cylindrical, articulated cœnobium; the red points are centralcapsules. Fig. 11. Collozoum inerme, Hkl., × 2 [25] A young cylindrical cœnobium; the red points are central capsules. Fig. 12. Collozoum inerme, Hkl., × 400 [25] A piece of a young colony with eight small central capsules, without oil-globules. n, The central nucleus in different stages of division. Two capsules are also dividing. x, Xanthellæ in the jelly-like calymma (blue), which also contains numerous vacuoles.