Habitat.—Central Pacific, Station 272, surface.
9. Xiphacantha macroptera, n. sp.
Spines four-winged, from the broad middle part gradually thinner towards both ends. Apex simple pyramidal. Base with small wing-cross. Four apophyses wing-shaped, very long and broad, triangular; their base occupies about the middle third of each spine; the proximal side of each wing is the shortest, truncated or concave.
Dimensions.—Length of the spines 0.4 to 0.5, greatest breadth (diagonal of the middle leaf-cross) 0.08 to 0.12.
Habitat.—North Pacific, Stations 253 to 256, surface.
10. Xiphacantha platyptera, n. sp.
Spines four-winged, nearly prismatic in the basal and distal parts. Apex truncated. Base with small wing-cross. Four apophyses wing-shaped, very broad and thin, extremely delicate, of irregular quadrangular or nearly rhomboidal form; their base occupies the middle half of the length of the spines (second and third quarter). Very variable in form. Often the edges of the wing-apophyses of the neighbouring spines seem to meet.
Dimensions.—Length of the spines 0.2 to 0.3, greatest breadth (diagonal of the leaf-cross) 0.06 to 0.08.
Habitat.—Pacific, widely distributed, Stations 239, 253, 272, 288, &c., surface.
11. Xiphacantha ciliata, n. sp. (Pl. [129], figs. 4, 5).