Report on the Radiolaria Collected by H.M.S. Challenger During the Years 1873-1876, First Part: Porulosa (Spumellaria and Acantharia) / Report on the Scientific Results of the Voyage of H.M.S. Challenger During the Years 1873-76, Vol. XVIII

by Ernst Haeckel

Habitat.—North Pacific, Station 253, depth 3125 fathoms.

Subgenus 2. Ellipsostylissa, Haeckel.

Definition.—Network of the shell irregular, with pores of different size or form.

7. Ellipsostylus megadictya, Haeckel.

Stylosphæra megadictya, Ehrenberg, 1872, Abhandl. d. k. Akad. d. Wiss. Berlin, p. 299, Taf. viii. fig. 13.

Proportion of the major axis to the minor = 5 : 4. Shell thin walled, with irregular, roundish, large meshes, four to five times as broad as the bars; only four to five on the half equator. Surface smooth. Polar spines straight, thin, angular; the shorter equal to the minor axis, the longer four times as large.

Dimensions.—Longer axis 0.05, shorter axis 0.04; meshes 0.01, bars 0.002; length of the polar spines—longer 0.12, shorter 0.03.

Habitat.—Philippine Sea, 3300 fathoms, Ehrenberg.

8. Ellipsostylus gallinula, n. sp.

Proportion of the major axis to the minor = 3 : 2. Shell thick walled, with irregular, roundish meshes, twice to four times as broad as the bars; eight to ten on the half equator. Surface thorny. Polar spines conical, straight; the longer twice as long as the major axis, the minor scarcely half as long.