Fig. 9. _Tetrapyle pleuracantha_, n. sp., × 400 646 Dorsal view. The lentelliptical central capsule is visible between medullary and cortical shell. Fig. 10. _Tetrapyle turrita_, n. sp., × 400 649 Oblique view, half dorsal, half lateral. Fig. 11. _Octopyle stenozona_, n. sp., × 400 652 Dorsal view. Fig. 12. _Octopyle sexangulata_, n. sp., × 300 653 Dorsal view. Fig. 13. _Octopyle decastyle_, n. sp., × 300 654 Dorsal view. Fig. 13_a_. Lateral view. Fig. 14. _Pylonium quadricorne_, n. sp., × 400 655 Dorsal view. Fig. 15. _Tetrapylonium quadrangulare_, n. sp., × 300 658 Dorsal view. Fig. 16. _Pylozonium octacanthum_, n. sp., × 300 660 Dorsal view. [Illustration: 1.-4. TRIZONIUM, 5.-7. AMPHIPYLE. 8.-10. TETRAPYLE, 11.-13. OCTOPYLE, 14.-16. PYLONIUM.] PLATE 10. LEGION SPUMELLARIA. Order LARCOIDEA. Family THOLONIDA. Fig. 1. _Tholartus tricolus_, n. sp., × 200 664 Fig. 2. _Tholodes cupula_, n. sp., × 500 665 Fig. 3. _Amphitholus artiscus_, n. sp., × 400 666 Fig. 4. _Amphitholus panicium_, n. sp., × 500 668 Fig. 5. _Amphitholus acanthometra_, n. sp., × 300 667 Fig. 6. _Amphitholus acanthometra_, n. sp., × 300 667 Frontal section of the shell. Fig. 7. _Amphitholonium tricolonium_, n. sp., × 300 669 Fig. 8. _Staurotholus tetrastylus_, n. sp., × 300 673 Fig. 9. _Staurotholus dodecastylus_, n. sp., × 400 674 Fig. 10. _Tholoma quadrigeminum_, n. sp., × 200 672 Fig. 11. _Staurotholonium octodoronium_, n. sp., × 300 676 Fig. 12. _Tholocubus tessellatus_, n. sp., × 200 677 Fig. 13. _Tholoma metallasson_, n. sp., × 300 672 Fig. 14. _Cubotholus regularis_, n. sp., × 200 680 Fig. 15. _Cubotholonium ellipsoides_, n. sp., × 300 682 Fig. 16. _Tholocubus tesseralis_, n. sp., × 400 678 Fig. 17. _Tholonium hexonium_, × 400 679 [Illustration: 1. 2. THOLARTUS, 3.-7. AMPHITHOLUS, 8.-10. STAUROTHOLUS, 11.-13. THOLOMA, 14. 15. CUBOTHOLUS, 16. 17. THOLONIUM.] PLATE 11. LEGION SPUMELLARIA. Order SPHÆROIDEA. Family ASTROSPHÆRIDA. Fig. 1. _Lychnosphæra regina_, n. sp., × 200 277