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

PLATE 131.

Legion ACANTHARIA.

Order ACANTHONIDA.

Family Quadrilonchida.

PLATE 131. 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. Quadrilonchida. Diam. Page. Fig. 1. Quadrilonche mesostaura, n. sp., × 300 [777] Fig. 2. Quadrilonche platystaura, n. sp., × 100 [777] Fig. 3. Xiphoptera dodecactena, n. sp., × 200 [778] The central capsule with the central part of the skeleton. Fig. 4. Lonchostaurus bifurcus, n. sp., × 300 [773] Fig. 5. Lonchostaurus crystallinus, n. sp., × 400 [773] Fig. 6. Lonchostaurus rhomboides, n. sp., × 200 [772] The radial spines are completely enclosed in the rhombic calymma, the surface of which is covered with small plates, similar to those in the shell of the Sphærocapsida. Fig. 7. Zygostaurus amphithectus, n. sp., × 300 [774] The square central capsule envelops the half skeleton. Fig. 8. Zygostaurus sagittalis, n. sp., × 300 [775] Fig. 9. Lithoptera tetraptera, n. sp., × 300 [779] Fig. 10. Lithoptera quadrata, n. sp., × 300 [780] The central part of the skeleton is enclosed by the four-lobed central capsule.

PLATE 131.
Quadrilonchida.
Diam.			Page.
Fig. 1. Quadrilonche mesostaura, n. sp.,	×	300	[777]
Fig. 2. Quadrilonche platystaura, n. sp.,	×	100	[777]
Fig. 3. Xiphoptera dodecactena, n. sp.,	×	200	[778]
The central capsule with the central part of the skeleton.
Fig. 4. Lonchostaurus bifurcus, n. sp.,	×	300	[773]
Fig. 5. Lonchostaurus crystallinus, n. sp.,	×	400	[773]
Fig. 6. Lonchostaurus rhomboides, n. sp.,	×	200	[772]
The radial spines are completely enclosed in the rhombic calymma, the surface of which is covered with small plates, similar to those in the shell of the Sphærocapsida.
Fig. 7. Zygostaurus amphithectus, n. sp.,	×	300	[774]
The square central capsule envelops the half skeleton.
Fig. 8. Zygostaurus sagittalis, n. sp.,	×	300	[775]
Fig. 9. Lithoptera tetraptera, n. sp.,	×	300	[779]
Fig. 10. Lithoptera quadrata, n. sp.,	×	300	[780]
The central part of the skeleton is enclosed by the four-lobed central capsule.

PLATE 132.

Legion ACANTHARIA.