Habitat.—South Atlantic, Station 332, surface.
9. Phatnaspis quadratura, n. sp.
Parmal pores regular, square, all of nearly equal size and form, ten to twelve on each side of the primary diagonal rib, which arises from both edges of the compressed spines; two primary aspinal pores opposite on the two flat sides of the latter, not different from the other pores. Spines sword-like, their outer part about as long as the inner.
Dimensions.—Length of the shell 0.2, breadth 0.16; basal breadth of the spines 0.004.
Habitat.—Central Pacific, Station 274, surface.
10. Phatnaspis tabulata, Haeckel.
Haliomma tabulatum, J. Müller, 1858, Abhandl. d. k. Akad. d. Wiss. Berlin, p. 37, Taf. v. figs. 5-8.
Haliomma tabulatum, Haeckel, 1862, Monogr. d. Radiol., p. 429.
Parmal pores regular, circular, with square frames, all of nearly equal size, eight to ten on each side of the primary diagonal rib, which arises from both edges of the compressed spines; two primary aspinal pores opposite on the flat sides of the latter. Spines sword-like, short, scarcely half as long as the radius of the shell, their central ends are thickened and cause by their union the deceptive appearance of an enclosed "medullary shell."
Dimensions.—Length of the shell 0.12 to 0.15, breadth 0.1 to 0.12; breadth of the spines 0.006.