FORAMINIFERA. 233 



Genus Marginuwna d'Orbigny. 

 Marginulina ensis Reuss. 



1845. Marginulina ensis Reuss, Verstein. bohm. Kreide, pt. i, 

 p. 29, pi. xii, fig. 13; pi. xiii, figs. 26, 27; pt. 2, p. 106, 

 pi. xxiv, fig. 30. 



1894. Nodosaria communis Woodward, Jour. N. Y. Microsc. 

 Soc, vol. X, No. 4, p. 103. 



1898. Marginulina ensis Bagg, Bull. U. S. G. S., No. 88, p. 51. 



Description. — "Test elongate, moderately compressed, oval or 

 elliptical in transverse section; shell variable in outline, either 

 nearly straight throughout its' whole length ot incurved ; septa 

 very slightly oblique, directed toward the primordial chamber, 

 apparent externally as ridges; proximal chambers more involute 

 than in Marginulina elongata; chambers numerous, apparent ex- 

 ternally; ultimate chamber somewhat prolonged, and ending 

 posteriorly in a short tube; aperture rotund, with crenulated 

 margin. 



"Length, 1.3, 1.73 mm.; breadth, 0.43 mm." (Bagg.) 



Remarks. — "Processor Sherborn prefers to change the word 

 Marginulina to Cristellaria for this species, thus making it 

 Cristellaria ensis ( Reuss) . The writer prefers to leave it under 

 the original name of Professor Reuss." (Bagg.) 



Pormation and locaiity. — Navesink marl, Bruere's pits on 

 Crosswicks Creek (Bagg) ; Hornerstown marl. Blue Ball 

 (Bagg) ; Vincentown limesand, Mullica Hill, New Egypt 

 (Bagg). 



Geographic distribution. — New Jersey. 



Marginulina pediformis Bornemann. 



1855. Marginulina pedifornus Bornemann, Zeitsch. d. Deutsch. 



geol. Gessell., vol. vii, p. 326, pi. xiii, fig. 13. 

 1898. Marginulina pediformis Bagg, Bull. U. S. G. S., No. 88, 

 P- 52. 



Description. — "Test smooth, short, circular in transverse sec- 

 tion ; consisting of about six chambers, of which the first two or 



