258 CRETACEOUS PALEONTOLOGY. 



1851. Rotalina ehrenbergii Bailey, Smithsonian Cont. to 



Knowl., vol. n, art. 3, p. 10, figs. 11-13. 

 1884. Truncatulina Jwidingern Brady, Chal. Rept., vol. ix, p. 



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

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



p. 65. 



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

 10, p. 35 (329)- 



Description. "Test circular, 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- 

 geriana, 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. Nautilus lobatulus Walker and Jacob, Adam's Essays, 



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

 1884. Truncatulina 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. Truncatulina lobatula Egger, Jahrsber. 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. Truncatulina lobatula Bagg, Bull. Am. Pal., vol. 2, No. 



10, p. 35 (329). 



