Cephalis multilobate; the posterior odd occipital lobe ovate, and of about the same size as the anterior frontal half of the shell, which is clustered and divided into five to seven smaller lobes, an odd subspherical sternal lobe, and on each side of it two or three pairs of smaller subspherical lobes. _Dimensions._--Length of the shell 0.09, breadth 0.06. _Habitat._--Western Tropical Pacific, Station 225, depth 4475 fathoms. Genus 487. _Cannobotrys_,[105] Haeckel, 1881, Prodromus p. 440. _Definition._--#Cannobotryida# with tubes on the cephalis. The genus _Cannobotrys_ differs from the preceding _Botryopera_ in the development of hollow radial tubes, arising from the lobate cephalis in various numbers. According to their number the genus may be divided into various subgenera: (1) _Cannobotrantha_ (_monocanna_) with a single apical tube; (2) _Cannobotrella_ (_dicanna_) with two divergent tubes, an ascending apical and a descending sternal one; (3) _Cannobotrissa_ (_tricanna_) with three tubes in the sagittal plane (an upper apical, a posterior caudal, and an anterior sternal); (4) _Cannobotromma_ (_tetracanna_) with four radial tubes disposed like the four typical spines of _Cortina_ (compare p. 950), and _Cannobotrusa_ (_pentacanna_) with five radial tubes disposed like the five typical spines of _Stephanium_ (p. 952). {1110}Perhaps these five groups may be separated as five genera, possessing near relations to five very different genera of NASSELLARIA (_Circospyris_, _Halicapsa_, _Archibursa_, _Cortina_, _Stephanium_, &c.) 1. _Cannobotrys monocanna_, n. sp. Cephalis trilobate, with a single cylindrical straight apical tube on the apex of the occipital lobe, which is helmet-shaped, and about one and a half times as long as the two subspherical frontal lobes. Pores small and numerous, subregular, circular. _Dimensions._--Length of the shell 0.05, breadth 0.03. _Habitat._--Tropical Atlantic, Station 347, depth 2250 fathoms. 2. _Cannobotrys dicanna_, n. sp. Cephalis quadrilobate, with two divergent tubes, an odd apical tube on the apex of the posterior occipital lobe, and an odd sternal tube on the anterior frontal lobe. Between these two odd lobes lie two paired lateral or buccal lobes, of about the same size. Shell nearly hyaline, with very few minute pores. _Dimensions._--Length of the shell 0.06, breadth 0.04. _Habitat._--Indian Ocean; Madagascar (Rabbe), surface. 3. _Cannobotrys tricanna_, n. sp. (Pl. 96, fig. 3). Cephalis quinquelobate, with three curved cylindrical tubes in the sagittal plane; an ascending apical tube on the apex of the helmet-shaped occipital lobe, and two horizontal tubes on the base of the shell (a posterior caudal, _c_, and an anterior sternal, _z_). The two frontal lobes are hemispherical, and twice as large as the two lateral buccal lobes. Pores very small and numerous. _Dimensions._--Length of the shell 0.08, basal breadth 0.06. _Habitat._--Central Pacific, Station 265, depth 2900 fathoms.