240 CRETACEOUS PALEONTOLOGY. 



1898. Cristellaria cultrata Bagg, Bull. Am. Pal., vol 2, No. 10, 



p. 26 (320). 

 19P4. Cristellaria cultrata Bagg, Md. Geol. Surv., Miocene, p. 



474, pi. 132, fig. 15. 



Description.— "^tsi circular, biconvex, smooth and glistening, 

 peripheral margin sharp, broadly keeled; chambers 7 to 11, in 

 final convolution, somewhat convex, smooth or costate; aperture 

 radiate. 



"Diameter, 1-2 mm." (Bagg.) 



Remarks. — "This species is common at Ereehold and is beau- 

 tifully preserved. The widtK of the marginal keel is variable, as 

 is also the number of chambers. It is similar to Cristellaria ro- 

 hiiata, with the addition of the keel. Specimens of Cristellaria 

 cultrata from New Egypt and Swedesboro are not smooth, as in 

 typical forms, but are marked externally by raised septa." 

 (Bagg.) 



Formation and locality. — Navesink marl. Freehold, Bruere's 

 pits on Crosswicks Creek, Marlboro (Bagg) ; Vincentown lime- 

 sand, Mullica Hill, New Egypt, Swedesboro, Timber Creek 

 (Bagg). 



Geographic distribution. — New Jersey; Miocene of Maryland 

 and Virginia. 



Cristellaria gibba d'Orbigny. 



Plate III., Figs. 4-5. 



1839. Cristellaria gibba d'Orbigny, Foram. Cuba, p. 63, pi. vii, 



figs. 20, 21. 

 1855. Cristellaria e.vcisa Bornemann, Zeitsch. d. Deutsch Geol. 



Gesell., vol. 7, p. 328, pi. 13, figs. 19-20. 



1862. Cristellaria pwlchella Reuss, Sitzungsb. d. k. Akad. Wiss. 



Wien, vol. 46, p. 71, pi. 8, fig. i. 



1863. Cristellaria concinna Reuss, Sitzungsb. d. k. Akad. Wiss. 



Wien, vol. 48, p. 52, pi. 5, fig. 58. 

 1884. Cristellaria gibba Brady, Challenger Report, vol. 9, pp. 



546, 547, Pl- Ixix, figs. 8, 9. 

 1898. Cristellaria gibba Bagg, Bull. U. S. G. S'.,No. 88, p*. 56. 



