PLATE 32. 



Phacodiscida. 



Fig. l. 

 Fis. 2. 



Fig. 3. 



Fig. 4. 



Fig. 5. 



Fig. 6. 



Fig. 7. 



Fig! 8. 



Astrophacus Solaris, n. sp., .... 



Astrophacus apollinis, n. sp., 



Astrophacus phacodiscus, n. sp., 

 Vertical section through the centrum. 



Astrosestrum ephyra, n. sp., . 



Fig. 4a. Transverse section through the double medullary shell, . 



Astrosestrum nauphanta, n. sp., 



Phacostylus caudatus, n. sp. (vel Astrosestrum caudatum), 



Perizona scutella, n. sp., 



Perizona pterygota, n. sp., 



Fig. 8a. Medullary shells and radial "beams connecting them with the disk, 





Diani. 



Page 



X 



300 



453 



X 



300 



455 



X 



300 



454 



X 



300 



442 



X 



300 



442 



X 



300 



442 



X 



200 



431 



. X 



400 



427 



X 



400 



427 



Z, X 



300 



427 



