EXPLANATION OF PLATE III. 



CRISTELLARIA CRETACEA Bagg, p. 239 



1-2. Lateral view and longitudinal section, (xs). (After Bagg.) 

 Vincentown limesand, Vincentown. 



CRISTELLARIA CULTRATA (Montfort), p. 239 



3. Lateral view, (xii). (After Bagg.) 



CRISTELLARIA GIBBA d'Orbigny, p. 240 



4-5. Lateral and front peripheral views of a recent individual, 

 (xiaH)- (After Challenger Report.) 



CRISTELLARIA ITALICA (Defrance) , p. 241 



6-7. Lateral and peripheral views, (x22^). (After Bagg.) 

 Hornerstown marl. 



CRISTELLARIA MAMILLIGERA Karrer, p. 242 



8. Lateral view of a recent individual, (xio). (After Chal- 

 lenger Report.) 



CRISTELLARIA MEGAPOLITANA (Reuss) , p. 242 



9-io. Lateral and front peripheral views (x?). (After Reuss.) 



CRISTELLARIA ROTULATA (Lamark), p. 243 



11-12. Lateral and front peripheral views of a recent individual, 

 (x6). (After Challenger Report.) 



CRISTELLARIA WETHERELLI (Jones), p. 245 



13. Lateral view of a recent individual, (xg). (After Challenger 

 Report.) 



CRISTELLARIA PROJECTA Bagg, p. 243 



14-15. Lateral view and longitudinal section, (xs). (After Bagg.) 

 Vincentown limesand, Vincentown. 



FLABELLINA SAGITTARIA (Lea), p. 247 



16-17. Lateral views of two individuals, (x2^). (After Bagg.) 

 Vincentown limesand, Vincentown. 



POLYMORPHINA coMMUNis d'Orbigny, p. 248 



18. Lateral view, (xi8^)- (After Bagg.) 



Vincentown limesand, Vincentown. 



POLYMORPHINA EMERSONI Bagg, p. 249 



19. Lateral view, (xi6^). (After Bagg.) 



Nave sink marl, Freehold. 



POLYMORPHIC COMPRESSA d'Orbigny, p. 248 



20. Lateral view of an Eocene specimen from Maryland, (x2o). 



(After Maryland Geological Survey.) 



POLYMORPHINA GIBBA (d'Orbigny), J . p. 250 



21. Lateral view of an Eocene specimen from Maryland, (x25). 



(After Maryland Geological Survey.) 



