FORAMINIFERA. 257 



"Length, 1.22 mm. ; breadth, 0.82 mm." (Bagg.) 



Remarks. "Similar to Truncatulina lobatula, but more de- 

 pressed, and with more finely perforate walls." (Bagg.) 



Formation and locality. Hornerstown marl, Blue Ball 

 (Bagg) ; Vincentown limesand, Timber Creek (Bagg). 



Geographic distribution. New Jersey; Eocene of Virginia. 



Genus TRUNCATULINA d'Orbigny. 



Truncatulina akneriana (d'Orbigny). 

 Plate IV.. Figs. 4-6. 



1846. Rotalina akneriana d'Orbigny, Foram. Foss. Bassin tert. 



Vienne, p. 156, pi. viii, figs. 13-15. 

 1866. Truncatulina akneriana Reuss, Denks. Akad. Wiss. Wien, 



vol. xxv, p. 1 60, No. 6. 

 1884. Truncafulina akneriana Brady, Chal. Rept., vol. ix, p, 



663, pi. xciv, fig. 8, a, b, c. 

 1898. Truncatulina akneriana Bagg, Bull. U. S. G. S., No. 88, 



p. 64. 



Description., "The superior face of the test of Truncatulina 

 akneriana is flat, the inferior convex at the margin, but depressed 

 toward the umbilicus ; and the convolutions are not completely 

 involute on the inferior side, as in Truncatulina lobatula, but 

 leave a portion of the earlier whorls visible at the center."' 

 (Brady.) 



"Diameter, 0.43 mm." (Bagg.) 



Remarks. "This form is commonly associated with Trun- 

 catulina lobatula or Truncatulina ungeriana, or with both, and 

 has a similar distribution." (Bagg.) 



Formation and locality. Manasquan marl, Vincentown 

 (Bagg). 



Geographic distribution. New Jersey. 



Truncatulina haidingerii (d'Orbigny). 

 Plate IV., Figs. 7-9. 



1846. Rotalina haidingerii d'Orbigny, Foram. Foss. Bassin tert. 

 Vienne, p. 154, pi. vii, figs. 7, 9. 

 17 PAL 



