Habitat.—Central Pacific, Station 263, surface.
8. Dorypelta dodecaspis, n. sp.
Apophyses of the long two-edged spines with anastomosing branches; each spine bearing a single free shield with six to eight parmal pores (four crossed aspinal pores alternating with four outer coronal pores), on the margin of each shield twelve to sixteen spikes. At the base of each spine (in the outer shell) four crossed aspinal pores, about as large as the other irregular pores.
Dimensions.—Diameter of the outer shell 0.1, of the inner 0.04.
Habitat.—North Pacific (off Japan), Station 235, surface.
Genus 370. Stauropelta,[[410]] Haeckel, 1881, Prodromus, p. 468.
Definition.—Phractopeltida with four simple equatorial spines and sixteen spines protected by external free apophyses (eight tropical and eight polar spines).
The genus Stauropelta is distinguished from the other Phractopeltida by the possession of sixteen pairs of free apophyses (on the eight tropical and the eight polar spines); only the other four equatorial spines remain simple, without apophyses, and form a simple cross in the equatorial plane.
1. Stauropelta cruciata, n. sp. (Pl. [133], fig. 3).
Apophyses of the long polar and tropical spines crossed by a transverse beam, which is again crossed by two perpendicular branches parallel to the apophyses; branches with free ends, not united by concrescence. At the base of each spine (in the outer shell) two large elliptical aspinal pores, larger than the other irregular pores. Four equatorial spines simple, without apophyses, of the same size as the other sixteen spines.