1. Acrobotrys monosolenia, n. sp.
Cephalis trilobate, with a single straight apical tube, which ascends vertically from the apex of the occipital lobe, and is pointed at the distal end, with an anterior oblique aperture. Two frontal lobes paired, ovate, half as long as the helmet-shaped occipital lobe. Thorax ovate, twice as long as the cephalis. Pores very scarce.
Dimensions.—Length of the shell 0.08, breadth 0.06.
Habitat.—Mediterranean (Corfu), surface.
2. Acrobotrys disolenia, n. sp. (Pl. [96], fig. 10).
Cephalis trilobate, with three odd ovate lobes of nearly equal size in the sagittal plane and two divergent straight slender cylindrical tubes, a vertical apical tube on the occipital lobe, and a horizontal nasal tube on the frontal lobe; the middle lobe between them is somewhat smaller. Thorax ovate, about twice as large as the cephalis, with constricted mouth. Pores small and numerous.
Dimensions.—Length of the shell 0.1, breadth 0.06.
Habitat.—Central Pacific, Station 265 to 274, depth 2350 to 2925 fathoms.
3. Acrobotrys aquaria, n. sp.
Cephalis quinquelobate, with two divergent long cylindrical curved tubes. Occipital lobe helmet-shaped, with an ascending apical tube; nasal lobe conical, with a descending sternal tube; between them a smaller odd middle lobe, and on each side of the latter an ovate frontal lobe. Thorax inflate, twice as long and broad as the cephalis. Pores small, scarce.