PLATE 26. 



LlOSPH^EIDA et ASTROSPH^ERIDA. 



Diam. Page 



Fig. 1. Coscinomma amphisiphon, n. sp., x 300 



Fig. la. A piece of the lattice-shell, . . . X 600 



Fig. II. Vertical section through the shell- wall, . . X 600 



Fig. 2. Heliosphcera hexagonaria, n. sp., . . . . x 300 217 



Fig. 3. Acanthosphcera castanea, n. sp., . . . x 400 211 



Fig. 4. Acanthosphcera angulata, n. sp., . . . x 300 216 



Fig. 5. Acanthosphcera reticulata, n. sp., . . . x 300 217 



Fig. 6. Heliosphcera coronata, n. sp., . . . . x 400 219 



Fig. 60. A single pore with its coronal, . . . X 300 



Fig. 7. Acanthosphcera mucronata, n. sp., . . . . x 400 212 



Fig. 8. Acanthosphcera clavata, n. sp., . . . x 400 212 



Fig. 9. Heliosphcera pectinata, n. sp., . . . x 400 218 



Fig. 10. Cenosph&ra perforata, n. sp., . . . . x 400 66 



Fig. 11. Cenosphcera coronata, n. sp., . . . . x 400 67 



