1. Cœlographis regina, n. sp. (Pl. [126], figs. 1a-1c).
Shell-mantle twice as long as broad, its frontal perimeter isosceles triangular, with a triangular excision at the base, its sagittal perimeter slenderly ovate. Nasal odd style twice as long as the paired tergal styles, the former with ten to twelve, the latter with five to six alternate-cruciate pairs of lateral branches. Terminal coronets (on the free distal ends of the styles) palmate, with ten to twelve spinulate, irregular, finger-shaped branches (fig. 1d).
Dimensions.—Length of the shell 5.6, breadth 2.7.
Habitat.—South-Eastern Pacific (off Juan Fernandez), Station 297, depth 1775 fathoms.
2. Cœlographis sagittella, n. sp.
Shell-mantle one and a half times as long as broad, its frontal perimeter arrow-shaped, isosceles triangular, with a deep concave excision at the base, its sagittal perimeter slenderly ovate. Nasal odd style one and a half times as long as the paired tergal styles, the former with fourteen to sixteen, the latter with eight to nine verticils of branches. Terminal coronets three times forked, with eight subregular, broad and spinulate, finger-shaped branches.
Dimensions.—Length of the shell 6.4, breadth 4.2.
Habitat.—Central Pacific, Station 271, depth 2425 fathoms.
3. Cœlographis hexastyla, n. sp.
Shell-mantle one and a half times as long as broad, very similar to the preceding species, its frontal perimeter isosceles triangular, with a flat basal excision. Nasal odd style one and a third times as long as the paired tergal styles, the former with fourteen to sixteen, the latter with ten to twelve verticils of branches. Terminal coronets with four forks in the form of a cross, and eight divergent spinulate fingers.