Dimensions.—Main axis 0.14, equatorial axis 0.09; meshes 0.008, bars 0.003; length of the polar tubes 0.12, breadth 0.02 to 0.03.
Habitat.—Pacific, central area, Station 268, depth 2900 fathoms.
2. Cannartus bitubulus, n. sp.
Pores of the shell regular, circular, hexagonally framed, of the same breadth as the bars; fourteen to sixteen on the half meridian, ten to twelve on the half equator. Polar tubes cylindrical, longer than the main axis, sulcated, distal ends broken off. (Similar to Pipetta tuba, Pl. [39], fig. 7, but with equatorial stricture and without medullary shell.)
Dimensions.—Main axis 0.16, equatorial axis 0.12; meshes and bars 0.006; length of the polar tubes 0.2, breadth 0.025.
Habitat.—South Atlantic, Station 332, depth 2200 fathoms.
3. Cannartus biscottus, n. sp.
Pores of the shell irregular, roundish, twice to three times as broad as the bars; ten to twelve on the half meridian, six to eight on the half equator. Polar tubes conical, shorter than the main axis, with closed apex. (Similar to Cannartidium bicinctum, Pl. [39], fig. 18, but without enclosed medullary shell.)
Dimensions.—Main axis 0.11, equatorial axis 0.07; meshes 0.005 to 0.01, bars 0.003; length of the polar tubes 0.08, breadth on the base 0.03.
Habitat.—Equatorial Atlantic, Station 348, depth 2450 fathoms.