6. Acrobotrys trisolenia, n. sp. (Pl. [96], fig. 8).
Cephalis quadrilobate, with four odd lobes and three divergent curved tubes, an ascending apical tube in the conical occipital lobe, and two descending tubes on the anterior and posterior basal lobes; between these three lobes a small central lobe. Thorax ovate, about as large as the cephalis. Pores small and numerous.
Dimensions.—Length of the shell 0.11, breadth 0.05.
Habitat.—Central Pacific, Station 266, depth 2750 fathoms.
7. Acrobotrys tetrasolenia, n. sp.
Cephalis trilobate, with four slender cylindrical tubes. Occipital lobe helmet-shaped, with an apical tube on the apex and a caudal tube on the base. Two frontal lobes ovate, prolonged into two paired pectoral tubes. The four tubes correspond in position to the four spines of Cortina. Thorax inflate, ovate, larger than the cephalis. Pores very scarce, rather large, irregular.
Dimensions.—Length of the shell 0.08, breadth 0.05.
Habitat.—North Pacific, Station 244, depth 2900 fathoms.
8. Acrobotrys pentasolenia, n. sp.
Cephalis quinquelobate, with five short conical tubes; three divergent odd tubes arise from three odd lobes; an apical from the occipital lobe, a posterior caudal from the suboccipital lobe, and an anterior sternal from the nasal lobe. Two paired lateral tubes arise from the base of two ovate frontal lobes. The five tubes correspond in disposition to the five spines of Stephanium. Thorax truncate. Pores small.