Habitat.—North Pacific, Station 244, depth 2900 fathoms.
2. Staurodictya ciliata, n. sp. (Pl. [42], fig. 2).
All rings of the disk concentric, of nearly equal breadth, circular or roundish, without perradial constrictions. Pores subregular, circular, three to four on the breadth of each ring. Four marginal spines short, pyramidal, about as long as the breadth of one ring. Margin between them ciliated, with thin radial bristles.
Dimensions.—Diameter of the disk (with four rings) 0.13; breadth of each ring 0.015; pores 0.0025.
Habitat.—South Pacific, Station 295, depth 1500 fathoms.
3. Staurodictya elegans, n. sp. (Pl. [42], fig. 1).
All rings of the disk concentric, circular, or roundish, of increasing breadth towards the margin; the fifth ring twice as broad as the first. Pores irregular, roundish, two to three on the breadth of each ring. Four marginal spines very large, conical, with a thin pedicle at the base, cancellated by ten to twelve deep furrows, about as long as the radius of the disk and three times as long as broad at the base (above the pedicle). Margin between them ciliated, with numerous short radial spines.
Dimensions.—Diameter of the disk (with six rings) 0.14; breadth of the inner rings 0.006, of the outer 0.012; pores 0.002 to 0.008.
Habitat.—Pacific, central area, Station 272, depth 2600 fathoms.
4. Staurodictya quadrispina, Haeckel.