Shell tuberculate, with sharp coronal and sagittal stricture. Galea campanulate, with very small circular pores, and a short conical apical horn of the same length. Cephalis nut-shaped, with large, irregular, roundish pores; two pairs of larger annular pores on each side of the sagittal ring, also four larger pores in the basal plate.
Dimensions.—Galea 0.03 long, 0.04 broad; cephalis 0.04 long, 0.07 broad.
Habitat.—Mediterranean, Messina, surface.
3. Pylospyris canariensis, n. sp. (Pl. [95], fig. 16).
Shell rough, with deep coronal and slight sagittal constriction. Galea hemispherical, with numerous small irregular, roundish pores, about half as long as the cephalis, with a slender conical horn of twice the length. Cephalis nut-shaped, with larger roundish pores of very unequal size, three pairs of larger pores on each side of the ring. Basal plate with two larger pores.
Dimensions.—Galea 0.03 long, 0.08 broad; cephalis 0.06 long, 0.11 broad.
Habitat.—North Atlantic, Canary Islands, surface.
Family LIV. Phormospyrida, Haeckel (sensu emendato) (Pl. [83], figs. 13-15; Pl. [95], figs. 17-19).
Phormospyrida, Haeckel, 1881, Prodromus, p. 442.
Definition.—Spyroidea with a thorax, without galea; the shell composed of the bilocular cephalis and of a simple thorax arising from its basal face.