Cephalis trilobate; occipital lobe helmet-shaped, nearly twice as long as the two ovate frontal lobes. Thorax about as long as the cephalis. Pores very small and scarce. _Dimensions._--Length of the shell 0.06, breadth 0.03. _Habitat._--Fossil in Barbados. 2. _Botryocella borealis_, Haeckel. _Lithobotrys borealis_, Ehrenberg, 1872, Abhandl. d. k. Akad. d. Wiss. Berlin, p. 294, Taf. ii. fig. 3. Cephalis trilobate; occipital lobe ovate, little longer than the two ovate frontal lobes. Thorax about twice as long as the cephalis. Pores very numerous and small. _Dimensions._--Length of the shell 0.08, breadth 0.04. _Habitat._--North Atlantic, Greenland, depth 1000 to 2000 fathoms. 3. _Botryocella tricellaris_, n. sp. Cephalis trilobate, with three odd sagittal lobes; the middle or central lobe larger than the anterior frontal and smaller than the posterior occipital lobe. Thorax nearly spherical, about as long as the cephalis. Pores small and scarce. _Dimensions._--Length of the shell 0.08, breadth 0.06. _Habitat._--North Atlantic, Station 353, depth 2965 fathoms. {1117}4. _Botryocella quadricellaris_, n. sp. (Pl. 96, fig. 13). Cephalis quadrilobate; the helmet-shaped occipital lobe twice as long as the two paired subspherical buccal lobes, and three times as long as the odd spherical frontal lobe. Thorax nearly spherical, about as long as the cephalis. _Dimensions._--Length of the shell 0.1, breadth 0.05. _Habitat._--Central Pacific, Station 272, depth 4475 fathoms. 5. _Botryocella quadrigemina_, n. sp. (Pl. 96, fig. 14). Cephalis quadrilobate, with two pairs of lateral ovate lobes and complete sagittal constriction; the two occipital lobes nearly twice as large as the two frontal lobes. Thorax ovate, separated from the cephalis by a collar septum with four cortinar pores (fig. 14). _Dimensions._--Length of the shell 0.09, breadth 0.06. _Habitat._--Indian Ocean, Sunda Strait (Rabbe), surface. 6. _Botryocella multicellaris_, n. sp. (Pl. 96, fig. 12). Cephalis multilobate; occipital lobe helmet-shaped, very large, about twice as long and broad as the frontal half of the shell, which is divided into six to eight small roundish clustered lobes. Thorax subspherical, of about the same size as the cephalis. _Dimensions._--Length of the shell 0.1, breadth 0.05. _Habitat._--South Pacific Station 297, depth 1775 fathoms. Genus 491. _Lithobotrys_,[108] Ehrenberg, 1844, Monatsber. d. k. preuss. Akad. d. Wiss. Berlin, p. 74. _Definition._--#Lithobotryida# with tubes on the cephalis, and with the mouth of the thorax closed.