3. Botryopera quadriloba, Haeckel.
Lithobotrys quadriloba, Ehrenberg, 1844, Monatsber. d. k. preuss. Akad. d. Wiss. Berlin, p. 84.
Cephalis quadrilobate; the occipital lobe helmet-shaped, one and a half times as long as the two paired hemispherical buccal lobes, and twice as large as the anterior frontal lobe. Pores not numerous, rather large, circular.
Dimensions.—Length of the shell 0.06, breadth 0.04.
Habitat.—Fossil in Barbados and North America (Virginia).
4. Botryopera quinqueloba, n. sp. (Pl. [96], fig. 2).
Cephalis quinquelobate; the occipital lobe helmet-shaped, and twice as long as the two hemispherical frontal lobes, three times as long as the subspherical lateral buccal lobes. Pores scarce, small, circular.
Dimensions.—Length of the shell 0.07, basal breadth 0.05.
Habitat.—North Pacific, Station 253, depth 3125 fathoms.
5. Botryopera multiloba, n. sp.