Fig. 1_a_. Vertical section through the shell-wall, showing two of the hollow alveoles, opening on its inside, ×1000 Fig. 2. _Polypetta tabulata_, n. sp., × 500 1677 In the upper part of the figure the dentate proboscis. Fig. 2_a_. A piece of the shell, seen from the surface, with the triangular plates, ×1000 Fig. 2_b_. Vertical section through the shell-wall, with an alveole, ×1000 Fig. 3. _Circostephanus coronarius_, n. sp., × 150 1699 The polyhedral shell exhibits in its wall the small tangential needles. The radial spines are partly broken off. The mouth of the shell, surrounded by eight short conical teeth, is visible on the left side of the figure. Fig. 3_a_. The mouth of the shell, seen in profile, with eight conical spinulate teeth, × 400 Fig. 3_b_. The base of a radial spine broken off, to show the corona of (five or six) basal pores, × 400 [Illustration: 1. 2. POROSPATHIS, 3. CIRCOSTEPHANUS.] PLATE 117. LEGION PHÆODARIA. Orders PHÆOCYSTINA ET PHÆOGROMIA. Families CANNORRHAPHIDA, MEDUSETTIDA et CIRCOPORIDA. Fig. 1. _Circogonia icosahedra_, n. sp., × 80 1698 The entire shell, with twelve radial tubes and twenty triangular faces. In the centre of one face is the mouth, with six teeth. Fig. 1_a_. The mouth alone, with its six spinulate teeth, × 400 Fig. 2. _Circorrhegma dodecahedra_, n. sp., × 80 1699 The entire shell, with twenty radial tubes and twelve pentagonal faces. In the centre of one face is the mouth, with five teeth. Fig. 2_a_. The mouth alone, with its five spinulate teeth, seen in profile, × 200 Fig. 3. _Circospathis novena_, n. sp., × 100 1696 The entire shell, with nine radial tubes and fourteen triangular faces. In one face (to the left above) is the mouth with nine teeth. Fig. 3_a_. The mouth alone, with its nine spinulate teeth, × 150 Fig. 4. _Circoporus hexastylus_, n. sp., × 80 1695 A single radial spine. Fig. 5. _Circoporus sexfurcus_, n. sp., × 80 1694 The entire spherical shell with six forked and ciliated radial tubes. In the centre the cruciform mouth with four teeth. Fig. 6. _Circoporus octahedrus_, n. sp., × 300 1695 The entire shell, with six verticillate radial tubes and eight triangular faces. In the centre of one face is the mouth, with four teeth. Fig. 7. _Cortinetta tripodiscus_, n. sp., × 300 1667 The entire shell with the enclosed central capsule, and the phæodium around the astropyle.