------------------------------------------------------------------------- III. Subfamily Nephrospyrida. No free basal feet. Shell spherical or discoidal. ------------------------------------------------------------------------- {Shell spherical or { subspherical, 484. _Sphærospyris_. Shell without external { transverse stricture. {Shell discoidal, { kidney-shaped or { subcircular, 485. _Nephrospyris_. Subfamily 1. LAMPROSPYRIDA, Haeckel. _Definition._--#Androspyrida# with three free basal feet (an odd posterior caudal foot and two paired anterior pectoral feet). Genus 479. _Androspyris_,[97] n. gen. _Definition._--#Androspyrida# with three free basal feet and a simple apical horn; lattice-work of the three-jointed shell simple, not spongy. The genus _Androspyris_ is probably the most original form of the Androspyrida, and represents, together with the following _Lamprospyris_, the subfamily of Lamprospyrida, which always possess three free basal feet, an odd posterior or caudal foot, and two paired anterior or pectoral feet. It may be derived either from _Acrospyris_ by development of a cupola, or from _Tholospyris_ by development of a thorax; the common ancestral form of these three typical genera is, no doubt, _Tripospyris_. Some species of _Androspyris_ reach a considerable size and are distinguished by a peculiar external form resembling somewhat a human figure. 1. _Androspyris homunculus_, n. sp. Shell thorny, with two deep transverse constrictions and irregular polygonal pores. Galea subspherical, with a strong pyramidal oblique horn, about two-thirds as large as the cephalis, which has the form of a human thorax, includes a strong ovate sagittal ring, and bears on each side a stronger lateral spine. Thorax short and broad, prolonged into three latticed divergent feet; the {1093}two lateral (pectoral) feet are like the legs of a human body, and are twice as long as the cephalis and as the tail-like caudal feet. (The whole shell exhibits a curious similarity to a human figure, more than in the following nearly allied species.) _Dimensions._--Length of the shell (including horn and feet) 0.4, breadth 0.1 to 0.15. _Habitat._--Central Pacific, Station 273, depth 2350 fathoms. 2. _Androspyris anthropiscus_, n. sp. (Pl. 83, fig. 8). Shell rough, with two distinct transverse constrictions and irregular polygonal pores. Galea ovate, with a slender conical oblique horn, about as large as the cephalis, which exhibits a deep longitudinal furrow in the sagittal dorsal line. Thorax half as long, prolonged into three short latticed feet; the terminal spines of the two lateral feet are vertical and parallel, that of the caudal foot larger, directed obliquely backwards. _Dimensions._--Length of the shell (including horn and feet) 0.35, breadth 0.1 to 0.12.