Pores irregular, roundish, or polygonal, twice to five times as broad as the bars; six to eight on the radius. Forty to sixty radial spines cylindrical, curved, as long as the shell radius, having at the distal end an irregular umbel, composed of six to twelve short branches, which are irregularly ramified or forked. (Differs from the regular Elaphococcus umbellifer mainly in the irregularity.)
Dimensions.—Diameter of the shell 0.14, pores 0.007 to 0.015, bars 0.003; length of the spines 0.12, breadth 0.01.
Habitat.—South-east Pacific (Juan Fernandez), Station 299, surface.
7. Elaphococcus drymodes, n. sp.
Pores irregular, roundish, little broader than the bars; ten to twelve on the radius. Eighty to one hundred and twenty (or more) radial spines, cylindrical, three to four times as long as the shell diameter, irregularly forked or repeatedly dichotomous (each spine with forty to sixty forked branches); the distal ends of all branches fall in a spherical plane. (Differs from the regular Elaphococcus cervicornis mainly in the irregularity.)
Dimensions.—Diameter of the shell 0.1, pores and bars 0.003 to 0.008; length of the spines 0.3 to 0.4, breadth 0.01.
Habitat.—Arctic Ocean, Iceland (Steenstrup).
Subfamily Haliommida,[[128]] Haeckel.
Diplosphærida, Haeckel, 1881, Prodromus, pp. 449, 451.
Definition.—Astrosphærida with two concentric spherical lattice-shells, united by radial beams.