4. _Cannobotrys sagittalis_, n. sp. Cephalis multilobate, with three straight divergent cylindrical tubes in the sagittal plane; a vertical apical tube on the apex of the ovate occipital lobe, and two horizontal tubes on the base, as in the preceding similar species; it differs from the latter in the greater number of lobes (seven or nine), the two frontal lobes being divided into two or four secondary lobules. _Dimensions._--Length of the shell 0.1, breadth 0.07. _Habitat._--Central Pacific, Station 274, depth 2750 fathoms. 5. _Cannobotrys cortina_, n. sp. (Pl. 96, fig. 4). Cephalis quinquelobate, with four cylindrical nearly straight tubes of equal size; an ascending, nearly vertical, apical tube on the apex of the occipital lobe, and three divergent descending tubes {1111}on the base of the shell (an odd posterior caudal tube and two paired anterior pectoral tubes). The two lateral buccal lobes are twice as large as the two anterior frontal lobes, and half as large as the posterior odd occipital lobe. The four tubes in this and the following species correspond probably to the four spines of _Cortina_ (p. 950). _Dimensions._--Length of the shell 0.07, basal breadth 0.06. _Habitat._--Central Pacific, Stations 263 to 274, depth 2350 to 2925 fathoms. 6. _Cannobotrys tetracanna_, n. sp. Cephalis multilobate, with four cylindrical curved tubes conical at their wider base, corresponding to those of the preceding species and to the four spines of _Cortina_. The odd occipital lobe is of about the same size as the anterior part of the shell, which is cleft into three pairs of roundish lobes, one pair of anterior larger frontal lobes, and two pairs of smaller lateral buccal lobes. Pores very few and minute. _Dimensions._--Length of the shell 0.11, basal breadth 0.07. _Habitat._--North Pacific, Station 253, depth 3125 fathoms. 7. _Cannobotrys pentacanna_, n. sp. Cephalis quinquelobate, with five cylindrical slender curved tubes, three of which are placed in the sagittal plane (a superior apical, a posterior caudal, and an anterior sternal), whilst the other two are paired and diverge laterally (two pectoral tubes). The five tubes correspond exactly to the five typical spines of _Stephanium_ (p. 952). The helmet-shaped occipital lobe of the shell is twice as large as each of the two anterior frontal lobes, and three times as large as each of the two lateral buccal lobes. Pores numerous. _Dimensions._--Length of the shell 0.07, basal breadth 0.04. _Habitat._--Western Tropical Pacific, Station 225, depth 4475 fathoms. Family LVII. #LITHOBOTRYIDA#, n. fam. _Definition._--Botryodea dithalamia, the shell of which is composed of a lobate cephalis and a simple thorax, without abdomen.