Report on the Radiolaria Collected by H.M.S. Challenger During the Years 1873-1876, Second Part: Subclass Osculosa; Index / Report on the Scientific Results of the Voyage of H.M.S. Challenger During the Years 1873-76, Vol. XVIII

by Ernst Haeckel

Dimensions.—Diameter of the basal square ring (diagonal) 0.01 to 0.02, of the meshes 0.005.

Habitat.—Fossil in different Tertiary rocks (Barbados, Oran, Greece, Sicily, &c.), Ehrenberg.

9. Dictyocha messanensis, Haeckel.

Dictyocha messanensis, Haeckel, 1862, Monogr. d. Radiol., p. 272, Taf. xii. figs. 3-6.

Dictyocha fibula, R. Hertwig (not Ehrenberg), 1879, Organismus d. Radiol., p. 89, Taf. ix. fig. 5.

Each pileated piece of the skeleton stirrup-shaped, very similar to Dictyocha fibula, but distinguished by a vertical apical spine in the centre of the transverse arch, which connects the two pairs of ascending bars.

Dimensions.—Diameter of the basal ring 0.02 to 0.03, of the meshes 0.01 to 0.016.

Habitat.—Mediterranean (Messina), North Atlantic (Canary Islands), Station 354, surface.

10. Dictyocha epiodon, Ehrenberg.

Dictyocha epiodon, Ehrenberg, 1844, Monatsber. d. k. preuss. Akad. d. Wiss. Berlin, p. 79; Mikrogeol., Taf. xviii. fig. 55.