Two coupled pileated pieces caught into one another (twin-piece). Fig. 9. _Distephanus corona_, n. sp., × 800 1566 A single pileated piece, seen from above. Fig. 10. _Cannopilus diplostaurus_, n. sp., × 800 1568 A single pileated piece, seen from above. Fig. 11. _Cannopilus cyrtoides_, n. sp., × 800 1569 A single pileated piece, seen obliquely from the side. Fig. 12. _Cannopilus cyrtoides_, n. sp., × 800 1569 A single pileated piece, seen from below. Fig. 13. _Haeckeliana porcellana_, John Murray, × 600 1526 The radiate operculum of the central capsule. [Illustration: 1.-6. HAECKELIANA, 7.-9. DISTEPHANUS, 10.-13. CANNOPILUS.] PLATE 115. LEGION PHÆODARIA. Order PHÆOGROMIA. Family CIRCOPORIDA. Fig. 1. _Circoporus sexfuscinus_, n. sp., × 100 1695 The cruciform mouth is visible in the upper part of the figure, to the right. Fig. 2. _Circoporus sexfuscinus_, n. sp., × 200 1695 A single radial spine, with four cruciate pores at the base. Fig. 3. _Circoporus sexfuscinus_, n. sp., × 600 1695 The radiate operculum of the central capsule, with the proboscis. Fig. 4. _Circospathis furcata_, n. sp., × 100 1696 Five of the nine spines are visible, two others (on the upper face) broken off. Between the latter the pentagonal mouth (with five teeth). Fig. 5. _Circospathis furcata_, n. sp., × 300 1696 The mouth with its five teeth. Fig. 6. _Circospathis furcata_, n. sp., × 400 1696 A piece of the shell with a radial spine. Fig. 7. _Circospathis furcata_, n. sp., × 400 1696 Vertical section through the base of a radial spine, to show the central funicle. Fig. 8. _Circogonia dodecacantha_, n. sp., × 100 1698 The central capsule with the elliptical nucleus (to the right) and the dark phæodium (to the left) are visible, in the upper part (to the left) the mouth of the shell, with six teeth. Fig. 9. _Circogonia dodecacantha_, n. sp., × 400 1698 A fragment of the shell, exhibiting its peculiar structure (needles tangentially scattered in the cement of the porcellanous substance), and a circle of nine pores around the base of a broken spine. Fig. 10. _Circospathis tetrodonta_, n. sp., × 400 1697 The mouth with four teeth, in profile view. [Illustration: 1.-3. CIRCOPORUS, 4.-10. CIRCOSPATHIS.] PLATE 116. LEGION PHÆODARIA. Order PHÆOGROMIA. Families MEDUSETTIDA et CIRCOPORIDA. Fig. 1. _Polypetta mammillata_, n. sp., × 500 1677 In the upper part of the figure the dentate proboscis.