Dimensions.—Diameter of the outer shell 0.07, of the inner 0.024.
Habitat.—Mediterranean (Nice), J. Müller, surface.
Genus 367. Pantopelta,[[407]] n. gen.
Definition.—Phractopeltida with twenty radial spines, each of which is protected by two free external apophyses.
The genus Pantopelta differs from all other Phractopeltida in the development of free protecting apophyses on all twenty radial spines. Only a single specimen of this rare form was seen, and in this all twenty spines exhibited no marked differences in form and size, but were more or less irregularly developed.
1. Pantopelta icosaspis, n. sp. (Pl. [133], fig. 4).
Apophyses of all twenty radial spines with forked anastomosing branches, forming a more or less irregular cup-like fenestrated shield, pierced by a variable number of pores. Distance of the apophyses from the outer shell equal to half its radius. Pores of the outer shell irregular, roundish, four to six times as broad as those of the inner shell. Radial spines compressed, sword-shaped, longer than the radius of the shell.
Dimensions.—Diameter of the outer shell 0.08, of the inner 0.03.
Habitat.—Antarctic Ocean, Station 157, depth 1950 fathoms.