Habitat.—Fossil in Barbados.
Genus 457. Aegospyris,[[75]] Haeckel, 1881, Prodromus, p. 442.
Definition.—Zygospyrida with five basal feet and three coryphal horns.
The genus Aegospyris differs from the preceding Clathrospyris, its ancestral form, in the possession of three horns on the coryphal face (one odd apical, and two paired frontal horns on each side), and therefore bears to the latter the same relation that Triceraspyris does to Tripospyris, and Liriospyris to Hexaspyris.
1. Aegospyris aequispina, n. sp.
Shell nut-shaped, tuberculate, with slight sagittal stricture. Pores subregular circular. Basal plate with four large collar pores. Three horns and five feet all of equal size and similar form, slender conical, slightly curved, widely divergent, about as long as the shell.
Dimensions.—Shell 0.08 long, 0.11 broad; horns and feet 0.08 long.
Habitat.—Central Pacific, Stations 265 to 274, depth 2350 to 2925 fathoms.
2. Aegospyris octospina, n. sp.
Shell nearly cubical, smooth, with slight sagittal stricture. Pores subregular circular; two pairs of larger pores on each side of the ring. Basal plate with four large pores. Two paired horns and four paired feet of equal size and similar form, S-shaped curved, twice as long as the shell. Odd horn and odd feet half as long, straight, conical.