PLATE CXII. 



Operculina. — Nummulites. — Heterostegina. 



Diani. Page 



Figures 1, 2. — Operculina ammonoides, Gronovius, sp., . x 50 745 



Figs. 1 a, 2. Lateral aspect; fig. 1 b, peripheral aspect. 



„ 3, 4, 5, 8. — Operculina complanata, Defrance, sp., . x 12 743 



Figs. 3 a, 4, 5, 8. Lateral aspect ; fig. 3 b, peripheral 

 aspect. 



,, 6, 7, 9, 10. — Operculina complanata, var. granulosa, 



Leyinerie, . . . x 12 743 



„ 11-13. — Nv/nvniulites cwmingii, Carpenter, . . x 18 749 



Figs, llff, 12, 13 as. Lateral aspect ; tigs, lib, 13 b, peri- 

 pheral aspect. 



,, 14-18. — Heterostegina clepressa, d'Orbigny, . . . . 746 



Figs. 14, 15. Adult specimens, lateral aspect, 



Fig. 16. Peripheral aspect, 



Figs. 17, 18. Young specimens, . 



,, 19, 20. — Heterostegina, sp., . . . . . 746 



Young specimens (<•/. Heterostegina eurva, Moebius), x 25 



