PLATE 51. 



Tripocalpida, Ph^nocalpida et Cyrtocalpida. 



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Fig. 1, Tripterocalpis phylloptera, n. sp.. 



Fig. 2. Tripterocalpis conoptera, n. sp., 



Fig. 3. Tripterocalpis ogmoptera, n. sp., 



Fig. 4. Tripterocalpis ogmoptera, n. sp., 



; A group of confluent pores, more enlarged 



Fig. 5. Tripterocalpis ogmoptera, n. sp., 





Diam. 



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Central capsule. In the centre the striate podoconus, above it four oil- 

 globules, to the right the nucleus. 



Fig. 6. Tripocalpis triserrata, n. sp., 



Fig. 7. Tridictyopus conicus, n. sp., 



Fig. 8. Tridictyopus vatillum, n. sp., 



Fig. 9. Cyrtophormis spiralis, n. sp., 



Fig. 10. Archicorys ovata, n. sp., 



Fig. 11. Cyrtocalpis gromia, n. sp., . 



Fig. 12. Archicorys microstoma, n. sp., 



Fig. 13. Cyrtocalpis urceolus, n. sp., 



The ovate central capsule exhibits in the lower half the podoconus, in the 

 upper half the spherical nucleus and three oil-globules. Between 

 the capsule and the shell numerous xanthellse, partly protruded 

 through the shell-mouth along the radiating pseudopodia. 



1138 



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1186 



