12. Eucyrtidium teuscheri, n. sp. (Pl. [77], fig. 5).
Shell smooth, bottle-shaped, with three distinct strictures. Four joints of different lengths. The third joint four times as long as each of the two first joints, and longer than the fourth, which is little constricted towards the mouth. The greatest breadth is in the middle of the shell. Cephalis hemispherical, with a small, conical horn of the same length. Pores large, circular, of variable sizes. Dedicated to Dr. Reinhold Teuscher.
Dimensions.—Length of the shell (with four joints) 0.16. Length of the single joints, a 0.015, b 0.02, c 0.07, d 0.055; breadth, a 0.03, b 0.05, c 0.08, d 0.06.
Habitat.—Central Pacific, Stations 266 to 274, depth 2350 to 2925 fathoms.
13. Eucyrtidium bütschlii, n. sp. (Pl. [77], fig. 7).
Shell rough, slender, ovate, truncate, with three distinct strictures. Four joints of different lengths; the third is the largest, inflated, subspherical. Fourth joint subcylindrical, little constricted towards the truncate mouth. Cephalis hemispherical, with a small, conical horn. Pores circular, much larger in the third joint than in the three others.
Dimensions.—Length of the shell (with four joints) 0.16. Length of the single joints, a 0.02, b 0.03, c 0.06, d 0.05; breadth, a 0.03, b 0.07, c 0.09, d 0.07.
Habitat.—North Pacific, Station 244, depth 2900 fathoms.
14. Eucyrtidium galatheæ, Ehrenberg.
Eucyrtidium galatheæ, Ehrenberg, 1854, Monatsber. d. k. preuss. Akad. d. Wiss. Berlin, p. 242.