Shell nut-shaped, spiny, with irregular roundish pores. Basal plate with three pairs of pores. Apical horn cylindrical, spinulate, twice to three times as long as the shell. Feet as long as the horn, S-shaped, widely divergent, irregularly branched, with widely distant pointed branches. _Dimensions._--Shell 0.08 long, 0.12 broad; horn and feet 0.2 to 0.3 long. _Habitat._--North Atlantic, Station 353, depth 2965 fathoms. 7. _Dendrospyris arborescens_, n. sp. (Pl. 85, fig. 9). Shell nut-shaped, tuberculate, with subregular circular pores. Basal plate with four central larger and ten to twelve peripheral smaller pores. Apical horn cylindrical, twice as long as the shell, in the distal half spinulate or tuberculate. Feet about three times as long as the shell, cylindrical, nearly vertical, in the distal half irregularly branched, with dense bunches of aggregated blunt branches. _Dimensions._--Shell 0.07 long, 0.09 broad; horn and feet 0.12 to 0.18 long. _Habitat._--Equatorial Atlantic, Station 347, depth 2250 fathoms. Genus 448. _Dorcadospyris_,[66] Haeckel, 1881, Prodromus, p. 441. _Definition._--#Zygospyrida# with two free lateral feet armed with a series of secondary spines. Apex with a horn. The genus _Dorcadospyris_ and the closely allied _Stephanospyris_ differ from the other Dipospyrida in the development of a series of secondary spines on the convex outer margin of the two large curved lateral feet, which therefore appear semipinnate. In some species this peculiar armature attains an extraordinary size, whilst the shell itself is very small, as in _Dorcadospyris dinoceras_ (Pl. 85, fig. 4). 1. _Dorcadospyris dentata_, n. sp. (Pl. 85, fig. 6). Shell subspherical, tuberculate with small regular circular pores. Basal plate with four larger pores. Apical horn three to four times as long as the shell, slender conical, smooth. Feet more or less convexly curved towards one another; the distal ends not crossed. In the convex edge of each arm a series of five to ten smooth conical teeth, not longer than the shell. This common species is very variable and often asymmetrical; the figured specimen is an asymmetrical one, in which the two arms exhibit different curves; in the normal form both arms have the same curve, now more, now less convex. _Dimensions._--Shell 0.06 long, 0.08 broad; horn 0.2, feet 0.03 long. _Habitat._--Central Pacific, Stations 267 to 274, depth 2350 to 2925 fathoms. {1041}2. _Dorcadospyris antilope_, n. sp. (Pl. 85, fig. 5). Shell subspherical, tuberculate, with small regular circular pores. Basal plate with four larger pores. Apical horn four to six times as long as the shell, straight, cylindrical, smooth. Feet of the same length, crescentic or nearly semicircular, with crossed distal ends. On the convex edge of each foot a series of twelve to fifteen smooth conical teeth, partly longer than the shell. (Very variable in size and curvature of the feet, and number of their teeth.)