6. _Gorgospyris liriope_, n. sp. (Pl. 87, fig. 6). Shell nut-shaped, thorny, with sharp sagittal stricture and irregular, roundish pores. Two pairs of larger annular pores on each side of the ring. Basal plate with two very large circular pores only. Eight to ten short feet vertical, about one-fourth as long as the shell, with an elegant papillate knob at the distal end. _Dimensions._--Shell 0.07 long, 0.1 broad; feet 0.02 long. _Habitat._--South Atlantic, Station 323, depth 1900 fathoms. 7. _Gorgospyris lamellosa_, n. sp. Shell nut-shaped, tuberculate, with subregular circular pores. Basal plate with four larger and four alternate pairs of smaller pores. Feet fifteen to twenty-five, broad, lamellar, vertical, truncate, about as long as the shell, of irregular size and form, very variable. _Dimensions._--Shell 0.07 long, 0.1 broad; feet 0.05 to 0.1 long. _Habitat._--Fossil in Barbados. Subgenus 2. _Thamnospyris_, Haeckel, 1881, Prodromus, p. 443. _Definition._--Feet divided or branched. 8. _Gorgospyris schizopodia_, n. sp. (Pl. 87, fig. 4). Shell hemispherical, smooth, with slight sagittal stricture and small regular, circular pores. Basal plate with four large central and a circle of small pores. Feet fifteen to twenty, broad, lamellar, confluent at the base, about as long as the shell, irregularly divided or forked. _Dimensions._--Shell 0.06 long, 0.08 broad; feet 0.05 to 0.08 long. _Habitat._--Western Tropical Pacific, Station 225, depth 4475 fathoms. 9. _Gorgospyris thamnopodia_, n. sp. _Thamnospyris thamnopodia_, Haeckel, 1881, Prodromus, p. 143. Shell nut-shaped, tuberculate, with deep sagittal stricture and irregular, roundish pores. Basal plate with numerous small pores. Feet twenty to thirty, slender, curved, divergent, twice to three times as long as the shell, irregularly branched. _Dimensions._--Shell 0.08 long, 0.12 broad; feet 0.15 to 0.25 long. _Habitat._--Indian Ocean (Madagascar), Rabbe, surface. {1072}Subfamily 8. CIRCOSPYRIDA, Haeckel, 1881, Prodromus, p. 443. _Definition._--#Zygospyrida# apoda, without descending basal feet. Genus 467. _Circospyris_,[85] Haeckel, 1881, Prodromus, p. 444. _Definition._--#Zygospyrida# without basal feet, with an apical horn. The genus _Circospyris_ and the following closely allied genus _Dictyospyris_ represent together the small subfamily Circospyrida, differing from all other Zygospyrida in the absence of feet on the basal face. They have probably arisen from the Tripospyrida (_Tripospyris_) by reduction and loss of the feet (in the same way as the eradiate #Cyrtoidea# from the triradiate). But it is also possible that many of the Circospyrida (if not all) are derived directly from the Semantida (_Clathrocircus_) by the closing of the two lateral openings and by completing the framework. 1. _Circospyris nucula_, n. sp. (Pl. 95, fig. 13).