PLATE CIX. 



NONIONINA. — POLYSTOMELL A. 



a, Lateral aspect ; b, peripheral aspect. 



Figures 1, 2. — Nonionina asterizans, Fichtel and Moll, sp., . x 



3-5. — Nonionina stelligera, d'Orbigny, 



Figs. 3, 4 x 75 diam. ; — fig. 5, . > 



6, 7. — Nonionina depressida, Walker and Jacob, sp., > 



8, 9. — Nonionina umbilicatula, Montagu, sp., . > 



10, 11. — Nonionina pompilioides, Fichtel and Moll, sp. , > 



, 12, 13. — Nonionina boueana, d'Orbigny, . . ) 



, 14-16. — Nonionina scapha, Fichtel and Moll, sp., . ) 



, 17-19. — Nonionina turgida, Williamson, sp., . . > 



, 20, 21. — Nonionina orbicularis, Brady, . . > 



, 22, 23. — Polystomella striatopunctata, Fichtel and Moll. 



sp., . . . . x 75 733 



