PLATE LV. 



Ehrenbergina. — Chilostomella. — Allomorphina. 



Diara. Fage 



Figure 1. — Ehrenbergina pupa, d'Orbigny, sp. 3 . x 75 433 



a, Ventral lateral aspect ; b, dorsal asjiect. 



„ 2-7. — Ehrenbergina serrata, Reuss, . . . 434 



Figs. 2 a, 6. Ventral lateral aspects; figs. 2 b, 7, dorsal aspects, x 60 



Fig. 3. Ventral aspect ; figs. 4, 5, oral aspects, . . x 75 



„ 8-11. — Ehrenbergina hystrix, Brady, . . x 60 434 



Figs. 8, 9. Ventral aspect ; figs. 10, 11, dorsal aspiect. 



,, 12-23. — Chilostomella ovoidea, Reuss, .... 436 



Figs. 12-18. Lateral aspects ; figs. 19, 20, oral aspects, . x 50 



Figs. 21, 22. Small specimens mounted in Canada balsam 

 and viewed by transmitted light, showing the arrange- 

 ment of the chambers, . . x 70 



Fig. 23. Specimen with part of the wall of the final segment 



removed, . . . . x 50 



,, 24-26. — Allomorphina trigonula, Reuss, .... 438 



Figs. 24, 25. Lateral aspects, . . x 60 



Fig. 26. Specimen mounted in Canada balsam and viewed 

 by transmitted light, showing the arrangement of the 

 chambers, . . . . x 100 



