Fig. 11. _Tricolospyris newtoniana_, n. sp., × 400 1098 Fig. 12. _Perispyris lentellipsis_, n. sp., × 400 1099 Fig. 13. _Perispyris bicincta_, n. sp., × 400 1099 [Illustration: 1. CIRCOSPYRIS, 2.-7. AMPHISPYRIS, 8.-11. TRICOLOSPYRIS, 12. 13. PERISPYRIS.] PLATE 89. LEGION NASSELLARIA. Order SPYROIDEA. Families ZYGOSPYRIDA, THOLOSPYRIDA et ANDROSPYRIDA. Fig. 1. _Tholospyris tripodiscus_, n. sp., × 400 1079 Ventral side. Fig. 2. _Tholospyris fenestrata_, n. sp., × 400 1079 Dorsal side. Fig. 3. _Tholospyris ramosa_, n. sp., × 400 1079 Dorsal side. Fig. 4. _Tholospyris cupola_, n. sp., × 400 1080 Ventral side. Fig. 5. _Therospyris leo_, n. sp., × 400 1059 Ventral side. Fig. 6. _Therospyris felis_, n. sp., × 400 1059 Dorsal side. Fig. 7. _Dictyospyris stalactites_, n. sp., × 400 1073 Ventral side. Fig. 8. _Dictyospyris anthophora_, n. sp., × 400 1076 Ventral side. Fig. 9. _Dictyospyris mammillaris_, n. sp., × 400 1076 Ventral side. Fig. 10. _Dictyospyris mammillaris_, n. sp., × 400 1076 Frontal section. Fig. 11. _Dictyospyris distoma_, n. sp., × 300 1073 Ventral side. Fig. 12. _Dictyospyris distoma_, n. sp., × 300 1073 Frontal section. Fig. 13. _Lamprospyris darwinii_, n. sp., × 300 1094 Ventral side. Fig. 14. _Lamprospyris huxleyi_, n. sp., × 300 1094 Ventral side. [Illustration: 1.-4. THOLOSPYRIS, 5. 6. TESSARASPYRIS, 7.-12. DICTYOSPYRIS, 13. 14. LAMPROSPYRIS.] PLATE 90. LEGION NASSELLARIA. Order SPYROIDEA. Family ANDROSPYRIDA. Fig. 1. _Nephrospyris paradictyum_, n. sp. (vel _Paradictyum paradoxum_), × 250 1102 The complete shell, seen from the frontal side. Fig. 2. _Nephrospyris paradictyum_, n. sp., × 250 1102 The incomplete shell, seen from the dorsal side. Fig. 3. _Nephrospyris paradictyum_, n. sp., × 500 1102 The sagittal ring, isolated, from the dorsal side; more enlarged. Fig. 4. _Nephrospyris paradictyum_, n. sp., × 120 1102 Vertical section through half the shell, exhibiting the thickened margin with the included symbiontes (compare page 1101). Fig. 5. _Nephrospyris paradictyum_, n. sp., × 200 1102 Oblique marginal view of the shell. Fig. 6. _Nephrospyris paradictyum_, n. sp., × 250 1102 Marginal view of a young specimen, with open fissure between the two parallel net-plates. Fig. 7. _Nephrospyris paradictyum_, n. sp., × 250 1102