FORAMINIFERA. 247 



extension of the primordial chamber; surface of test smooth 

 and glistening; aperture a small radiate, terminal opening. 



"Length, 1.8-4 mm." (Bagg.) 



Formation and locality. Vincentown limesand, Vincentown, 

 Brownsville (Bagg). 



Geographic distribution. New Jersey. 



Flabellina sagittaria (Lea). 

 Plate III., Figs. 16-17. 



1833. Palmula sagittaria* Lea, Contributions to Geol., pp. 219- 

 220, pi. vi, fig. 228. 



1842. Planularia cimeata Morton, Jour. Acad. Nat. Sci., Phil- 

 adelphia, vol. viii, pt. 2, p. 214, pi. xi, fig. 5. 



1898. Plabellina sagittaria Bagg, Bull. U. S. G. S., No. 88, p. 

 59, pi. 4, figs, i a-b. 



Description. "Test complanate, broadly elliptical (some- 

 times rather narrow and more elongate), occasionally slightly 

 convex along the median line, while the opposite side is .concave, 

 though in typical specimens both surfaces are flat ; septa distinct, 

 forming a sharp median angle; chambers numerous, the number 

 dependent somewhat upon the size of the individual; peripheral 

 margins moderately rounded; primordial chamber bulbous, mu- 

 cronate, or more usually smooth; surface smooth and glistening; 

 aperture typically mammillate, though frequently the shell is 

 worn or broken off so that a round opening appears. 



"Length, 1-9 mm. ; breadth, 1-4.3 mm -" (Bagg.) 



Remarks. "This species is one of the most common forms at 

 Vincentown. It is very variable in size and shape and is found 

 in all stages or growth. As has been previously stated, it was 

 the first Foraminifera to be described from the New Jersey green- 

 sands." (Bagg.) 



Formation and locality. Hornerstown marl, Blue Ball 

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

 Brownsville, etc. (Bagg). 



Geographic distribution. New Jersey. 



