1. Tuscarora bisternaria, John Murray (Pl. [100], figs. 1, 1a).
Tuscarora bisternaria, John Murray, 1879, in litteris, Narr. Chall. Exp., vol. i. p. 226, pl. A, figs. 16, 16a.
Shell subspherical, with three lateral perradial feet in the equatorial zone, and three basal interradial teeth around the mouth, alternating regularly with the former. The three lateral feet arise either in the equator itself or a little above it, and are nearly horizontally expanded, descending a little towards the aboral pole. They are straight, cylindrical, twice to four times as long as the shell, geniculate at the inflated base, and covered with small thorns. A circle of six to eight basal pores in the base of each foot. The narrow mouth is triangular, surrounded by the thorny, inflated, subspherical bases of the three long, cylindrical, diverging, thorny teeth, which ascend obliquely and are longer than the shell; each tooth exhibits in the upper part of the inflated base a corona of eight to ten ovate holes.
Dimensions.—Length of the shell 2.0, breadth 1.5.
Habitat.—Central Pacific, Station 264, depth 3000 fathoms.
2. Tuscarora murrayi, n. sp. (Pl. [100], fig. 2). John Murray, 1876, L. N. [27], pl. 24, fig. 4.
Shell pear-shaped, with three circoral perradial feet in the upper third and three basal interradial teeth around the mouth. The three lateral feet are thin, cylindrical, arcuate, very bristly, arise immediately beyond the narrow tubular peristome, and ascend obliquely nearly to the height of the mouth; then they are curved downwards in a large arc, three to four times as long as the shell. The tubular peristome is about half as long as the shell, bottle-shaped, nearly three-sided prismatic, and bears three very long spinulate teeth, which in the lower half are parallel, in the upper slightly curved and diverging, at the base pear-shaped. Three ovate basal pores in the inflated base of each foot and each tooth.
Dimensions.—Length of the shell 2.5, breadth 1.5.
Habitat.—South Pacific, Station 295, depth 1500 fathoms.
3. Tuscarora wyvillei, n. sp. (Pl. [100], figs. 3, 3a-3c).