Shell subspherical, smooth, with slight sagittal stricture. Pores small, roundish; on each side of the ring two pairs of larger annular pores. Basal plate with four pores. Horn stout, three-sided prismatic, half as long as the shell. Feet twelve to sixteen, lamellar, lobate (the most part with three lobes), nearly vertical, about as long as the shell. _Dimensions._--Shell diameter 0.05; horn 0.03, feet 0.05 long. _Habitat._--South Atlantic, Station 335, depth 1425 fathoms. Genus 464. _Anthospyris_,[82] Haeckel, 1881, Prodromus, p. 443. _Definition._--#Zygospyrida# with numerous (seven to nine or more) basal feet and three coryphal horns. The genus _Anthospyris_ differs from the preceding _Petalospyris_, its ancestral form, in the possession of three horns on the coryphal face (one odd middle apical horn and two paired frontal horns, one on each side). The former therefore bears to the latter the same relation that _Triceraspyris_ does to _Tripospyris_ and _Liriospyris_ to _Hexaspyris._ 1. _Anthospyris mammillata_, n. sp. (Pl. 87, fig. 16). Shell nut-shaped, mammillate, with deep sagittal stricture and irregular, polygonal pores. Basal plate with two large ovate pores (?). The pediculate apical horn and the two frontal horns stout and short, conical, twice to three times as large as the conical papillæ of the surface. Feet twelve to fifteen, lanceolate lamellar, pointed, divergent, about as long as the shell. _Dimensions._--Shell 0.05 long, 0.08 broad; horns 0.03, feet 0.04 long. _Habitat._--Central Pacific, Station 272, depth 2600 fathoms. {1065}2. _Anthospyris spathulata_, n. sp. (Pl. 87, fig. 15). Shell subspherical, thorny, with slight sagittal stricture and irregular, roundish pores. Basal plate with three large pores. The three horns spindle-shaped, half as long as the ten to twelve thin feet, which are pediculate, shovel-shaped, a little divergent, and shorter than the shell. _Dimensions._--Shell 0.05 diameter; horn 0.02 long, feet 0.04 long. _Habitat._--North Pacific, Station 250, depth 3050 fathoms. 3. _Anthospyris diaboliscus_, Haeckel. _Petalospyris diaboliscus_, Ehrenberg, 1854, Mikrogeol., Taf. xxxvi. fig. 12; Abhandl. d. k. Akad. d. Wiss. Berlin, 1875, p. 80, Taf. xxii. fig. 3. Shell nut-shaped, smooth, with slight sagittal stricture and small circular pores. Basal plate with four large pores. Apical horn straight conical, frontal horns curved laterally. Feet nine to twelve, of about the same length as the horns and the shell, broad lamelliform, truncate, nearly vertical, slightly curved. _Dimensions._--Shell 0.04 long, 0.07 broad; horns and feet 0.05 to 0.07 long. _Habitat._--Fossil in Barbados. 4. _Anthospyris arachnoides_, Haeckel. _Petalospyris arachnoides_, Haeckel, 1862, Monogr. d. Radiol., p. 294, Taf. xii. fig. 7.