Page:Scientific results HMS Challenger vol 18 part 1.djvu/271

Rh 7. Cenosphæra bombus, n. sp.

Shell thick walled, rough. Pores regular, circular, with thin hexagonal frames, of the same breadth as the bars, twenty to twenty-two on the quadrant.

Dimensions.—Diameter of the shell 0.3, pores and bars 0.005.

Habitat.—Tropical Atlantic, Station 347, depth 2250 fathoms.

8. Cenosphæra melecta, n. sp.

Shell thick walled, papillate. Pores regular, circular, double-edged, with thick hexagonal frames, of the same breadth as the bars; a short conical papilla in the corner of each hexagon; fourteen to sixteen pores on the quadrant.

Dimensions.—Diameter of the shell 0.2, pores and bars 0.008.

Habitat.—Fossil in Barbados.

9. Cenosphæra anthophora, n. sp.

Shell thick walled, papillate. Pores regular, circular, with an elegant six-lobed frame and a coronal of six short papillæ; the latter alternating with the six lobes (quite as in Pl. 28, fig. 1b). Pores twice as broad as the bars, ten to twelve on the quadrant.

Dimensions.—Diameter of the shell 0.13, pores 0.01, bars 0.005.

Habitat.—Central Pacific, Station 271, surface.

10. Cenosphæra rosetta, n. sp.

Shell thin walled, smooth. Pores regular, circular, with an elegant six-lobed outer opening, without papillæ. Pores of the same breadth as the bars, six to eight on the quadrant.

Dimensions.—Diameter of the shell 0.1, pores and bars 0.006.

Habitat.—South Atlantic, Station 323, depth 1900 fathoms.

Definition.—Pores of the spherical shell regular or subregular, circular, without hexagonal frames or lobes, all nearly of equal size and form.

11. Cenosphæra porophæna, Ehrenberg.

Cenosphæra porophæna, Ehrenberg, 1858, Monatsber. d. k. preuss. Akad. d. Wiss. Berlin, p. 31.

Shell thin walled, smooth. Pores regular, circular, six to eight times as broad as the bars, five to six on the quadrant.

Dimensions.—Diameter of the shell 0.1, pores 0.012, bars 0.002.

Habitat.—Mediterranean (Crete, depth 1100 fathoms; Corfu, surface).