PLATE 53. 



Zygospyrida, Tripocalpida. Ph^enocalpida et Cyrtocalpida. 





Diam. 



Page 



Fig. 1. Archicapsa triforis, n. sp., ...... 



. x 300 



1191 



Lateral view. 







Fig. 2. Archicapsa triforis, n. sp., ...... 



. X 300 



1191 



Basal view. 







Fig. 3 Halicapsa triglochin, n. sp., ..... 



. x 200 



1190 



Lateral view. 







Fig. 4. Halicapsa triglochin, n. sp., 



. x 200 



1191 



Basal view. 







Fig. 5. Halicapsa hystrix, n. sp., ...... 



. x 200 



1191 



Lateral view. 







Fig. 6. Halicapsa hystrix, n. sp., ...... 



. x 200 



1191 



Basal view. 







Fig. 7. Cantharospyris platybursa, n. sp. (vel Platybursa compressa), 



. x 400 



1051 



Fig. 8 Tessarospyris clathrobursa, n. sp. (vel Clathrobursa dictyopus), 



. x 400 



1045 



Fig 9. Peridium spinipes, n. sp., ...... 



. x 500 



1154 



Fig. 10. Peridium palmipes, n. sp., ...... 



. x 500 



1154 



Fig 11. Archiscenium quacbrispinum, n. sp., . . 



. x 500 



1150 



In tlie spherical central capsule the dark nucleus is visible. 







Fig. 12. Euscenium eucolpium, n. sp., ..... 



. x 500 



1147 



Fig. 13. Cladoscenium ancoratum, n. sp., ..... 



. x 400 



1149 



Fig. 14. Pteroscenium pinnatum, n. sp., ..... 



. x 400 



1152 



Lateral view. 







Fig. 15. Pteroscenium pinnatum, n. sp., 



. x 400 



1152 



Vertical section. 







Fig. 16. Pteroscenium pinnatum, n. sp., ..... 



. x 400 



1152 



Basal view. 







Fig. 17. Calpophama hexarrhabda, n. sp., ..... 



. x 400 



1176 



Fig. 18. Calpophcena hexarrhabda, n. sp., ..... 



. x 400 



1176 



Basal plate. 







Fig. 19. Tetraspyris tetracorethra, n. sp., ..... 



. x 400 



1044 



With the four-lobed central capsule, in each lobe an oil-globule. 







Fig. 20. Tetraspyris tetracorethra, n. sp., ..... 



. x 800 



1044 



Shell more enlarged. 



