FORAMINIFERA. 245 



1898. Cristellaria trachyomphala Bagg, Bull. U. S. G. S., No. 



88, p. 58. 



Description. "Test rounded, compressed, with angular peri- 

 phery ; umbilical disc raised, nearly round, more marked in some 

 forms than others ; septal lines distinct, convex. There are from 

 8 to 10 chambers in the last whorl. Aperture a triangular- 

 shaped opening surrounded by a raised crenulated margin at the 

 external edge of the ultimate segment. 



"Diameter, 0.86-1.3 nim." (Bagg.) 



Formation and locality. Hornerstown marl, Blue Ball 

 (Bagg). 



Geographic distribution. New Jersey. 



Cristellaria triangularis d'Orbigny. 



1840. Cristellaria triangularis d'Orbigny, Mem. Soc. geoL 

 France, ser. i, vol. iv, p. 27, pi. ii, figs. 21, 22. 



1845. Cristellaria triangularis Reuss, Verstein. bohm. Kreide, 

 pt. i, p. 34, pi. viii, fig. 48. 



1898. Cristellaria triangularis Bagg, Bull. U. S. G. S., No. 88, 

 p. 58. 



Description. "Test triangular, very convex, smooth; peri- 

 phery sharply carinate; lateral surfaces somewhat concave; 

 chambers few, six or seven, large, evolute, superposed; septa 

 oblique, very slightly convex anteriorly; 'septal plane broadly 

 triangular; aperture radiate. 



"Length, i mm." (Bagg.) 



Remarks. "The occurrence of this species from the craie 

 blanche of the Paris basin, France, was recorded by d'Orbigny 

 as early as 1840. I have found but two specimens in the lower 

 marl of Freehold." (Bagg.) 



Formation and locality. Navesink marl, Freehold (Bagg). 



Geographic distribution. New Jersey. 



Cristellaria wetherellii (Jones). 



Plate III, Fig. 13. 



1854. Marginulina wetherellii Jones, Morris Catalogue, Brit. 

 Foss., ed. 2, p. 37. 



