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 PHÆOCONCHIA.

Family Cœlographida.

PLATE 122. Cœlographida. Diam. Page. Fig. 1. Cœlotholus octonus, n. sp., × 30 [1749] The entire bivalved shell, seen obliquely from the dorsal and somewhat from the right side, enveloped by the yellowish calymma. Fig. 2. Cœlotholus octonus, n. sp., × 100 [1749] One valve of the shell (h) with its large galea and the origin of the three styles. The base of the two lateral styles (g1, g2) is connected by two latticed lateral frenula (b1, b2) with the mouth (m) of the rhinocanna (t). The odd style (g3) is free. Fig. 3. Cœlothauma duodenum, n. sp., × 20 [1750] The entire shell, seen from the dorsal side. The long styles are enveloped by the yellowish calymma. Fig. 4. Cœlothauma duodenum, n. sp., × 80 [1750] One valve of the shell (h), seen from the apical side; t, rhinocanna; m, its mouth; b1, b2, the two lateral frenula; g1, g2, the two paired styles; g3, the odd style. Fig. 5. Cœlothauma duodenum, n. sp., × 80 [1750] One valve of the shell, seen in profile. Characters as in fig. 4. Fig. 6. Cœlothamnus bivalvis, n. sp., × 30 [1751] The entire shell, enveloped by the yellowish calymma, seen from the left side; between the two valves is the central capsule, with nucleus and astropyle. Fig. 7. Cœlothamnus bivalvis, n. sp., × 100 [1751] A single lateral anchor-pencil. Fig. 8. Cœlothamnus bivalvis, n. sp., × 200 [1751] Distal end of a style, with its anchor-pencils. Fig. 9. Cœlothamnus bivalvis, n. sp., × 400 [1751] A single anchor-thread, with its quadridentate terminal spathilla.

PLATE 122.
Cœlographida.
Diam.			Page.
Fig. 1. Cœlotholus octonus, n. sp.,	×	30	[1749]
The entire bivalved shell, seen obliquely from the dorsal and somewhat from the right side, enveloped by the yellowish calymma.
Fig. 2. Cœlotholus octonus, n. sp.,	×	100	[1749]
One valve of the shell (h) with its large galea and the origin of the three styles. The base of the two lateral styles (g1, g2) is connected by two latticed lateral frenula (b1, b2) with the mouth (m) of the rhinocanna (t). The odd style (g3) is free.
Fig. 3. Cœlothauma duodenum, n. sp.,	×	20	[1750]
The entire shell, seen from the dorsal side. The long styles are enveloped by the yellowish calymma.
Fig. 4. Cœlothauma duodenum, n. sp.,	×	80	[1750]
One valve of the shell (h), seen from the apical side; t, rhinocanna; m, its mouth; b1, b2, the two lateral frenula; g1, g2, the two paired styles; g3, the odd style.
Fig. 5. Cœlothauma duodenum, n. sp.,	×	80	[1750]
One valve of the shell, seen in profile. Characters as in fig. 4.
Fig. 6. Cœlothamnus bivalvis, n. sp.,	×	30	[1751]
The entire shell, enveloped by the yellowish calymma, seen from the left side; between the two valves is the central capsule, with nucleus and astropyle.
Fig. 7. Cœlothamnus bivalvis, n. sp.,	×	100	[1751]
A single lateral anchor-pencil.
Fig. 8. Cœlothamnus bivalvis, n. sp.,	×	200	[1751]
Distal end of a style, with its anchor-pencils.
Fig. 9. Cœlothamnus bivalvis, n. sp.,	×	400	[1751]
A single anchor-thread, with its quadridentate terminal spathilla.

PLATE 123.

Legion PHÆODARIA.

Order PHÆOCONCHIA.

Family Concharida.

PLATE 123. Concharida. Diam. Page. (The central capsule is coloured red in the figures of this plate, the phæodium green). Fig. 1. Concharium diatomeum, n. sp., [1717] Dorsal view. The central capsule (red) exhibits above the anterior tubular main-opening (astropyle), and below the two small posterior lateral openings (right and left parapylæ). Fig. 2. Concharium bivalvum, n. sp., × 150 [1717] Dorsal view. The central capsule is visible in the lower part, the margin of the two valves in the upper part of the figure. Fig. 2a exhibits the two smooth lateral margins of the valves, catching into one another. (Lateral view). Fig. 3. Concharium nucula, n. sp., [1717] The dorsal valve alone, seen from the outside. Fig. 4. Concharium bacillarium, n. sp., [1718] Lateral view from the smooth margin, by which the two valves are united. Fig. 5. Conchasma radiolites, n. sp., × 300 [1719] Lateral view. In the aboral half of the shell-cavity lies the red central capsule, in the oral half the green phæodium. Fig. 6. Conchasma sphærulites, n. sp., × 300 [1719] Lateral view. On the aboral pole the two horns of the hinge. Fig. 7. Conchellium tridacna, n. sp., × 200 [1720] Oblique lateral view (from the right and ventral side). Fig. 7a. Three pores of the same, with their hexagonal frames and six internal denticles, × 400 Fig. 8. Conchopsis carinata, n. sp., × 150 [1725] Lateral view, from the left side. Fig. 9. Conchopsis lenticula, n. sp., × 150 [1726] Lateral view, from the right side. The two membranes of the central capsule are separated by a wide interval in this and the preceding figure. The nucleus contains numerous nucleoli. Fig. 9a. Two of the peculiar cells, which are contained in the green phæodium in large numbers, × 400