PLATE LXX. 



Cristellaria. 



Diain. Page 



Figure 1. — Cristellaria crassa, d'Orbigny, . . x 40 549 



a, Lateral aspect ; b, front peripheral aspect. 



,, 2. — Cristellaria nitida, d'Orbigny, . . x 30 549 



«, Lateral aspect ; />, front peripheral aspect. 



,, 3.— Cristellaria reniformis , d'Orbigny, . x 25 539 



a, Lateral aspect ; b, front peripheral aspect. 



„ 4-6. — Cristellaria cultrata, Montfort, sp., . . . 550 



Fig. 4. a, Lateral aspect ; b, front peripheral aspect, . 

 Fig. 5, 6. Lateral aspects. Fig. 5x15 diain. ; fig. 



,, 7, 8. — Specimens of the same, with dentate carina, 

 ,, 9-15. — Cristellaria calcar, Linne, sp., 



Lateral aspect ; figs. 9-12, 15, x 35 diam. ; figs. 13, 14, 

 ., 16. — Cristellaria papillosa, Fichtel and Moll, . 



Lateral aspect. 



,, 17, 18. — Cristellaria mamilligera, Karrer, . . x 20 553 



Lateral aspect. 



