FORAMINIFERA. 253 



Polymorphina problema (d'Orbigny). 

 Plate III., Figs. 27-28. 



1826. Guttulina problema d'Orbigny, Ann. Sci. Nat., vol. vii, 



p. 266, No. 14, Modele No. 61. 

 1870. Polymorphina problema Brady, Parker and Jones, Trans. 



Linn. Soc. London, vol. xxvii, p. 225, pi. xxxix, fig. 



n, a-b. 

 1898. Polymorphina problema Bagg, Bull. U. S. G. S., No. 88, 



p. 62. 



Description. '"Test oblong ovate, composed of several in- 

 flated chambers (six in one specimen) marked by strong septal 

 depressions. Very similar to the more abundant Polymorphina 

 communis, but differing from that species in the greater number 

 of chambers. Surface of shell smooth; aperture small, rotund, 

 radiate. 



"Length, i mm.; breadth, 0.73 mm." (Bagg.) 



Formation and locality. Vincentown limesand, New Egypt, 

 Mullica Hill, Timber Creek (Bagg). 



Geographic distribution. New Jersey. 



Polymorphina regularis von Minister. 

 Plate III., Figs. 29-31. 



1838. Polymorphina regularis von Miinster (fide Rcemer), 

 Neues Jahrb. fur Min., p. 385, pi. iii, fig. 21. 



1870. Polymorphina regularis Brady, Parker, and Jones, Trans. 

 Linn. Soc. London, vol. xxvii, p. 229, pi. xl, fig. 13 a-c. 



1898. Polymorphina regularis Bagg, Bull. U. S. G. S., No. 88, 

 p. 63. 



Description. "Test oblong, compressed, biconvex, narrow 

 below but somewhat broader above; peripheral margin thin, 

 rounded ; chambers four to nine, oblique ; septal lines marked by 

 slight constrictions visible externally ; surface smooth ; aperture 

 small, round, central, surrounded by fine grooves. 



"Length, 1-4 mm. ; greatest breadth, 1.6 mm." (Bagg.) 



