Pyramids more or less irregular, with four, five, or six sides, of somewhat different form and unequal size; crowned at the top with one, two, or three slender apical spines, of variable length. These spines as well as the bars of the network bear scattered cruciate verticils, each usually composed of four crossed, small, lateral branches.
Dimensions.—Diameter of the shell 2 to 3.0, length of the bars 0.1 to 0.15, breadth 0.003.
Habitat.—Central Pacific, Stations 263 to 274, surface.
7. Sagoscena gracilis, Haeckel.
Aulosphæra gracilis, R. Hertwig, 1879, Organism. d. Radiol., p. 91, Taf. ix. fig. 4.
Pyramids more or less irregular, with five, six, or seven sides, often of somewhat different form and unequal size; crowned at the top with a single radial spine, which has the same size as the bars of the network, and bears in its distal half four cruciate verticils, each composed of four crossed and curved horizontal branches.
Dimensions.—Diameter of the sphere 1 to 2, length of the bars 0.08 to 0.09, breadth 0.002.
Habitat.—Mediterranean (Messina), surface.
8. Sagoscena fragilis, n. sp.
Pyramids very irregular, with four to eight sides, of different form and unequal size; crowned at the top with a single, slender, radial spine, of the same thickness as the slender bars of the network; the latter as well as the former are smooth, without lateral branches.