PLATE 32. 

 PHACODISCIDA. 



Diarn. Page 



Fig. 1. Astrophacus Solaris, n. sp., . . . . x 300 453 



Fig. 2. Astrophacus apollinis, n. sp., . . . . x 300 455 



Fig. 3. Astrophacus phacodiscus, n. sp., 'V* . . x 300 454 



Vertical section through the centrum. 



Fig. 4. Astrosestrum ephyra, n. sp., . . . . x 300 442 



Fig. 4a. Transverse section through the double medullary shell, . . x 300 442 



Fig. 5. Astrosestrum nauphanta, n. sp., . . . x 300 442 



Fig. 6. Phacostylus caudatus, n. sp. (vel Astrosestrum caudatum), . x 200 431 



Fig. 7. Perizona scutella, n. sp., . . . . x 400 427 



Fig. 8. Perizona pt&rygota, n. sp., . . . . . x 400 427 



Fig. 8a. Medullary shells and raiHal beams connecting them with the disk, X 300 427 



