_Habitat._--Central Pacific, Station 272, depth 2600 fathoms. 5. _Acrobotrys auriculata_, n. sp. (Pl. 96, fig. 11). Cephalis quadrilobate, with three pointed and auriculate tubes, two ascending apical (an anterior and a posterior) in the helmet-shaped occipital lobe, and a descending sternal tube on the base of the frontal lobe; between the lobes two lateral paired buccal lobes. Thorax campanulate, twice as broad as the cephalis. Pores rather large and numerous. _Dimensions._--Length of the shell 0.1, breadth 0.08. _Habitat._--Central Pacific, Station 271, depth 2425 fathoms. 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 {1116}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. _Dimensions._--Length of the shell 0.12, breadth 0.09. _Habitat._--Tropical Atlantic, Station 347, depth 2250 fathoms. Genus 490. _Botryocella_,[107] Haeckel, 1881, Prodromus, p. 440. _Definition._--#Lithobotryida# without tubes on the cephalis, and with the mouth of the thorax closed. The genus _Botryocella_ differs from the closely allied _Botryopyle_ in having the mouth of the thorax closed, and may be derived from it by development of a lattice-plate, effecting this closure. It bears therefore the same relation to the latter that _Dicolocapsa_ has to _Dictyocephalus_. 1. _Botryocella nucula_, Haeckel. _Lithobotrys nucula_, Ehrenberg, 1875, Abhandl. d. k. Akad. d. Wiss. Berlin, p. 76, Taf. iii. fig. 16. _Lithobotrys adspersa_, Ehrenberg, 1875, Abhandl. d. k. Akad. d. Wiss. Berlin, p. 76, Taf. iii. fig. 15.