Habitat.—Western Tropical Pacific, Station 225, depth 4475 fathoms.
3. Pylobotrys cerebralis, n. sp. (Pl. [96], fig. 22).
Cephalis multilobate, with four divergent cylindrical tubes, which are cylindrical, obliquely truncate at the mouth, and correspond in position to the four typical spines of Cortina; an ascending apical tube and three descending basal tubes (an odd caudal and two paired pectoral). The helmet-shaped occipital lobe is about as large as the frontal half of the cephalis, which is divided into three pairs of smaller pyriform lobes. Thorax subspherical, about as large as the cephalis and half as large as the inflated abdomen. Pores very scarce and small.
Dimensions.—Length of the shell 0.15, breadth 0.08.
Habitat.—Indian Ocean, Cocos Islands, Rabbe, surface.
Genus 494. Botryocampe,[[111]] Ehrenberg, 1860, Monatsber. d. k. preuss. Akad. d. Wiss. Berlin, p. 829.
Definition.—Pylobotryida without tubes on the cephalis, and with the mouth of the abdomen closed.
The genus Botryocampe may be derived from Botryocyrtis by development of a basal lattice-plate, closing the terminal mouth of the abdomen. It is at the same time closely allied to the Tricyrtid Theocapsa, and may be perhaps derived from this by lobation of the cephalis.
1. Botryocampe inflata, Ehrenberg.
Botryocampe inflata, Ehrenberg, 1861, Monatsber. d. k. Akad. d. Wiss. Berlin, p. 296; Abhandl. d. k. Akad. d. Wiss. Berlin, 1872, p. 285, Taf. ii. fig. 4.