PLATE I. 



NUBECULARIA. — BlLOCULlNA. 



Biarn. Page 



Figures 1-4. — Nubecularia tibia, Jones and Parker, . . x 50 135 



© 



,, 5-8. — Nubecularia inflata, n. sp., . . x 50 135 



„ 9-16. — Nubecularia lucifuga, Defrance, . . . . 134 



Figs. 9-15. Adherent specimens in various aspects, . x 20 



Fig. 16. Free specimen from shore-sand, exterior some- 

 what worn, . . . x 25 



,, 17, 18. — Biloculina irregularis, d'Orbigny, . . . 140 



Fig. 17. a, Lateral aspect ; b, front aspect. . x 20 



Fig. 18. a, Lateral aspect ; b, front aspect, . x 30 



,, 19, 20. — Biloculine variety of Triloculina cimeata, Karrer, . 139 



Fig. 1 9. a, Lateral aspect ; b, front aspect, . x 45 



Fig. 20. a, Lateral aspect ; b, oral aspect, . x 45 



