PLATE 15. 



Staurosph^erida et Druppulida. 



Fig. 1. Cromyatractus tetracelyphus, n. sp., . 

 Fig. la. The two inner medullary shells. 



Fig. 2. Cromyatractus tetraphr actus, n. sp., 



Fig. 3. Cromyatractus cepicius, n. sp., 



The spongy distal part of a polar spine. 



Fig. 4. Cromyatractus ceparius, n. sp. (vel Caryostylus ceparius), 



Fig. 5. Staurolonche pertusa, n. sp., 

 Fig. 5a. Its medullary shell. 



Fig. 6. Staurosphwra philippi, n. sp., . 



Fig. 7. Stauroxiphus gladius, n. sp., 



Fig. 8. Staurocaryum arborescens, n. sp., 



Fig. 9. Rhizoplegma radicatum, n. sp., 



Fig. 9 a. The medullary shell, which is completely hidden in fig. 9 by the 

 numerous club-shaped apophyses of the central capsule. 





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