Plate 52. 



Fk;. ], 2. Polymorphinn probhiha, var. hidicd. X 20. DooTO. 



3. I'ohjinorphina oblonga. X 50. 



4. I olymorj.hiiia lacka. var. obloiu/a. X 66. D5(j01. 



5. Poh/morphina, species. X 50. 



6. Lagena apiculata. X 33. 



7. Noclosaria subsiriaiula. X 33. 1)5123. 



8. Nodosaria subsiriaiula. X 100, showing details of iicck and aperture. 



9. Nodosai-ia subsiriaiula. X 100, aperture. 



541 



