A complete specimen, excellently preserved, with an ovate alveolate calymma and two central capsules. The surface of the calymma is covered with tangential needles. Fig. 2. _Aulospathis bifurca_, n. sp., × 100 1586 An isolated central capsule of another specimen, surrounded by granules of the phæodium. _o_, Radiate operculum of the astropyle; _u_, the two lateral parapylæ; _e_, external membrane of the capsule; _i_, internal membrane; _c_, vacuoles in the protoplasm; _n_, nucleus; _l_, numerous nucleoli. Fig. 3. _Aulospathis bifurca_, n. sp., × 80 1586 Two central capsules of another specimen, surrounded by the phæodium (Self-division). Characters as in fig. 2. Fig. 4. _Aulospathis bifurca_, n. sp., × 100 1586 A single radial tube. Fig. 5. _Aulospathis bifurca_, n. sp., × 200 1586 Distal part of another radial tube, partly filled up by air-bubbles. Fig. 6. _Aulospathis trifurca_, n. sp., × 200 1586 Distal part of a single radial tube. Fig. 7. _Aulospathis trifurca_, n. sp., × 200 1586 Distal part of another radial tube. Fig. 8. _Aulospathis triodon_, n. sp., × 100 1587 A single radial tube. Fig. 9. _Aulospathis tetrodon_, n. sp., × 200 1588 Distal end of single tube. Figs. 10-13. _Aulospathis polymorpha_, n. sp., × 400 1587 Four single terminal branches with very different forms of spathillæ. Figs. 14-17. _Aulospathis variabilis_, n. sp., × 400 1588 Four single terminal branches with very different forms of spathillæ. [Illustration: AULOSPATHIS] PLATE 105. LEGION PHÆODARIA. Order PHÆOCYSTINA. Family AULACANTHIDA. AULACANTHIDA. Fig. 1. _Aulodendron indicum_, n. sp., × 200 1590 A single tube. Fig. 2. _Aulodendron pacificum_, n. sp., × 400 1589 Distal half of a tube. Fig. 3. _Aulodendron australe_, n. sp., × 300 1589 A single tube. Fig. 4. _Aulacantha spinosa_, n. sp., × 300 1575 Distal half of a tube. Fig. 5. _Aulodendron antarcticum_, n. sp., × 300 1589 A single tube. Fig. 6. _Aulographis pistillum_, n. sp., × 300 1579 A single tube. Fig. 7. _Aulographis martagon_, n. sp., × 300 1579 Distal end of a single tube. Fig. 8. _Aulographis triæna_, n. sp., × 80 1579 A single tube. Fig. 9. _Aulographis flammabunda_, n. sp., × 100 1579 Distal end of a tube. Fig. 10. _Aulographis flosculus_, n. sp., × 300 1580 Distal end of a tube. Fig. 11. _Aulographis gemmascens_, n. sp., × 100 1580