256 CRETACEOUS PALEONTOLOGY. 



1905. Glohigerina cretacea Bagg, Bull. U. S. G. S., No. 268, p. 

 42, pi. 8, fig. I. 



Description. — ^"Test rotaliform, but strongly depressed; 

 superior surface flattened or but slightly convex, inferior side 

 depressed toward the center and excavated at the umbilicus; 

 periphery obtuse and lobulated ; shell typically composed of three 

 fairly distinct convolutions, the outermost consisting of from five 

 to seven segments, the latter relatively small, subglobular ; aper- 

 ture opening into the umbilical vestibule. 



"Diameter, less than i mm." (Bagg.) 



Formntion and locality. — Navesink marl. Freehold (Bagg) ; 

 Vincentown limesand, Quinton, Vincentown, Mullica Hill, Tim- 

 ber Creek, etc. ( Bagg) . 



Geographic distribution. — New Jersey; Miocene of Maryland 

 and California. 



Family ROTALIDAE. 

 Sub-family ROTALINAE. 



Genus Discorbina Parker and Jones. 



Discorbina bertheloti (d'Orbigny). 



Plate IV., Pigs. 1-3. 



1839. Rosalina bertheloti d'Orbigny, Foram. Canar., vol. ii, pt. 



2, p. 135. Pl- i> %s. 28-30. 

 1884. Discorbina bertheloii, Brady, Chal. Rept., vol. ix, p. 650, 



pi. Ixxxix, figs. 10-12. 

 1898. Discorbiim bertheloii Bagg, Bull. U. S. G. S., No. 88, p. 



64. 

 1898. Discorbina berthelo-ti, Bagg, Bull. Am. Pal., vol. 2, No. 



10, P- 34 (328). 

 1901. Discorbina bertheloti Bagg, Md. Geol. Surv., Eocene, p. 



251, pi. 64, fig. I. 



Description. — ^"Test very strongly compressed, carinate, per- 

 forate; spiral side approximately flat, reverse side low, convex; 

 chambers depressed, numerous., convex, with limbate margins. 



