Dimensions.—Diameter of the shell 0.3, of the single chambers 0.02 to 0.08.
Habitat.—North Pacific, Station 244, depth 2900 fathoms.
2. Soreuma acinosum, n. sp.
Shell irregularly lentelliptical, with different growth in the three dimensions, composed of a large number (forty to sixty or more) of irregular, roundish chambers of very different sizes, the largest six to eight times as broad as the smallest. Pores subregular, circular, twice as broad as the bars. Surface smooth.
Dimensions.—Length of the shell 0.21, breadth 0.17, height 0.13; diameter of the largest chambers 0.03, of the smallest 0.004.
Habitat.—Pacific, central area, Station 271, depth 2425 fathoms.
3. Soreuma subglobosum, n. sp.
Shell nearly spherical, composed of a variable number (twelve to fifteen or more) of irregularly aggregated subspherical chambers of nearly equal size. Pores subregular, circular, twice as broad as the bars. Surface thorny.
Dimensions.—Diameter of the shell 0.25, of the largest chambers 0.04, of the smallest 0.005.
Habitat.—Pacific, central area, Station 266, depth 2750 fathoms.