Central capsules spherical, very large, opaque, containing a great number (ten to thirty) of large oil-globules, and between them densely packed masses of dark pigment. Membrane thick, double-edged. This species differs from Collozoum inerme, mainly by the great size of the central capsules (three to five times as big as in the former) and the great number of oil-globules in them.
Dimensions.—Diameter of the central capsules 0.2 to 0.3.
Habitat.—Central Pacific, Station 272, surface.
Subgenus 2. Colloprunum, Haeckel.
Definition.—Form of the central capsules ellipsoidal, with one prolonged axis.
4. Collozoum ovatum, n. sp.
Colloprunum ovatum, Haeckel, 1882, Manuscript.
Central capsules ovate or ellipsoidal, its longer diameter twice to three times as large as the shorter. In the centre of every capsule one single oil-globule.
Dimensions.—Length of the central capsules 0.2 to 0.3, breadth of them 0.1 to 15.
Habitat.—North Pacific, Station 244, surface.