Shell tuberculate, with distinct sagittal and collar strictures. Pores irregular, roundish. Cephalis nut-shaped, larger than the short truncate thorax. Horn conical, shorter than the cephalis. Peristome with a coronet of twelve to fifteen short triangular feet, which are parallel and vertical, slightly curved and shorter than the thorax. _Dimensions._--Cephalis 0.05 long, 0.07 broad; thorax 0.03 long, 0.07 broad. _Habitat._--Fossil in Barbadoes. 2. _Patagospyris lanceolata_, n. sp. Shell tuberculate, with slight sagittal and sharp collar strictures. Pores subregular, circular. Cephalis subspherical, about as large as the truncate subcylindrical thorax. Horn spindle-shaped, about as long as the cephalis. Peristome with a coronet of fifteen to twenty divergent lanceolate lamellar feet, longer than the thorax. _Dimensions._--Cephalis 0.08 long, 0.09 broad; thorax 0.07 long, 0.07 broad. _Habitat._--Fossil in Barbados. 3. _Patagospyris stiligera_, Haeckel. _Lithobotrys stiligera_, Ehrenberg, 1875, Abhandl. d. k. Akad. d. Wiss. Berlin, p. 76, Taf. iii. fig. 17. Shell smooth, hyaline, with deep sagittal and collar strictures. Pores very small and few. Cephalis nut-shaped, bilobed, of the same breadth as the cylindrical thorax. Horn conical, about as long as the cephalis. Peristome with a coronet of six to nine broad lamellar feet (in Ehrenberg's figure broken off). _Dimensions._--Cephalis 0.04 to 0.05 diameter; thorax 0.06 long, 0.05 broad. _Habitat._--Fossil in Barbados. 4. _Patagospyris anthocyrtis_, n. sp. (Pl. 95, fig. 19). Shell smooth, with deep sagittal and deep collar strictures. Pores irregular, roundish, of various sizes, numerous. Cephalis nut-shaped, with two inflated bosoms, about twice as broad as the short cylindrical thorax. Horn stout, pyramidal, about as long as the cephalis. Peristome with a coronet of fifteen to twenty parallel and vertical triangular lamellar feet, nearly as long as the thorax. _Dimensions._--Cephalis 0.05 long, 0.1 broad; thorax 0.04 long, 0.06 broad. _Habitat._--Tropical Atlantic, Station 347, depth 2250 fathoms. Genus 477. _Rhodospyris_,[95] Haeckel, 1881, Prodromus, p. 443. _Definition._--#Phormospyrida# with numerous basal feet (nine to twelve or more), and with three coryphal horns. {1089}The genus _Rhodospyris_ differs from the preceding _Patagospyris_ in the development of three coryphal horns (one odd middle apical horn, and two paired frontal horns on each of its sides), and therefore bears the same relation to the latter that the similar _Anthospyris_ does to _Petalospyris_. When the numerous basal feet of _Anthospyris_ become connected by lattice-work, _Rhodospyris_ arises. 1. _Rhodospyris tricornis_, n. sp. (Pl. 83, fig. 13).