>. 





POLYMORPHINA LACTEA (Walker and Jacob), ......................... p. 250 



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



(After Maryland Geological Survey.) 



23. Lateral view of a recent specimen, (x25). (After Challenger 



Report.) 



POLYMORPHINA LACTEA (Elongate variety) Brady, ..................... p. 251 



24-25. Oral and lateral views of a recent individual, (x37J^). 

 (After Challenger Report.) 



POLYMORPHINA ORBIGNII (Zborzewski), ............................... p. 252 



26. Lateral view of a recent individual, (x?). (After Parker, 

 Jones and Brady.) 



POLYMORPHINA PROBLEMA (d'Orbigny), .............................. p. 253. 



27-28. Lateral views of two recent individuals, (x2 and x3). (After 

 Parker, Jones and Brady.) 



POLYMORPHINA REGULARIS von Miinster, .............................. p. 253. 



29-31. Lateral views of two recent individuals, with an oral view 

 of the smaller one, (x4). (After Parker, Jones and 

 Brady.) 



GLOBIGERINA BULLOIDES d'Orbigny, ................................... p. 254 



32-34. Upper, peripheral and lower views of a typical recent shell, 

 (x25). (After Challenger Report.) 



GLOBIGERINA BULLOIDES var. TRILOBA Reuss, ............................ p. 255 



35. Upper view of a recent individual, (xso). (After Challenger 

 Report.) 



