. Fig. 9. A. Notoplites drygahkii (Kluge). St. WS 27, South Georgia. To show internal spines (attached to oblique distal wall) and differences in orifice from N. vanhoffeni (cf. Fig. 10 B). In some specimens the distal wall is farther from orifice. B. N. drygahkii (Kluge). St. TN 331, Ross Sea. Ovicell and adjacent structures. The operculum is open. C. N. ?drygahkii (Kluge). St. TN 194, off Oates Land. One zooecium showing abnormal scutum. Slightly oblique view. Operculum open. D. N. antarcticus (Waters). St. 1948, near Elephant Island. One zooecium. internal spine, sc. scutum. 6-2

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