258 CRETACEOUS PALEONTOLOGY. 



1 85 1. Ro'tcdina ehrenbergu Bailey, Smithsonian Cont. to 



Knoiwl., vol. II, art. 3, p. 10, figs. 11-13. 

 1884. TruntatuHna haidingerii Brady, Chal. Rept., vol. ix, p. 



663, pi. xcv, fig. 7, a-c. 

 1898. Trimcattdina haidingerii Bagg, Bull. U. S. G. S., No. 88, 



p. 65. 

 1898. Truncatwlina haidingerii Bagg, Bull. Am. Pal., vol. 2, No. 



10, P- 35 (329)- 



Description. — "Test circtilar, biconvex, trochoid; volutions 

 three, chambers marked by slightly depressed septa on inferior 

 side, about twelve segments in the last convolution; aperture a 

 small marginal slit. 



"Diameter, 0.58 mm." (Bagg.) 



Remarks. — "The above species is similar to Truncatulina- un- 

 g,eriana, but differs from it in being more valuted and less de- 

 pressed at the umbilicus. It is also a smaller form and is not so 

 abundant, being rather rare in the middle marl bed. There is, 

 furthermore, no distinct groove following the whorls upon the 

 superior side, and the perforations are smaller than in Trun- 

 catulina ungeriana." (Bagg.) 



Formation and locality. — Vincentown limesand, Vincentown 

 (Bagg). 



Geographic distribution. — New Jersey; Eocene of Virginia. 



Truncatulina lobatula (Walker and Jacob). 

 Plate IV., Figs. 10-12. 



1798. Namtilus lobahdus Walker and Jacob, Adam's Essays, 



Kanmacher's ed., p. 642, pi. xiv, fig. 36. 

 1884. TrufDcatulina lobatula Brady, Challenger Report, vol. 9, 



pp. 660, 661, pi. xcii, fig. 10; pi. xciii, figs, i, 4, 5 ; pi. 



cxv, figs. 4, 5. 

 1895. Trimcatulina lobatula Egger, Jalirsber. Naturalist, Ver. 



Passau, vol. 16, p. 31, pi. v, fig. 5, a, b, c. 

 1898. Truncatulina lobatula Bagg, Bull. U. S. Geol. Survey, No. 



88, p. 65. 

 1898. Truncatidina lobatula Bagg, Bull. Am. Pal., vol. 2, No. 



10, p. 35 (329)- 



