228 CRETACEOUS PALEONTOLOGY. 



Formation and locality. Marshalltown clay-marl, Marshall- 

 town (Bagg). 



Geographic distribution. New Jersey. 



Frondicularia inversa Reuss. 



1844. Frondicularia inversa Reuss, Geogn. Skizze Bohm., vol. 



ii, pt. i, p. 211. 



1845. Frondicwlara inversa, Reuss, Verstein. bohm Kreide, pt. 



i, p. 31, pi. viii, figs. 15-19; pi. xiii, fig. 42. 

 1898. Frondkularia inversa Bagg, Bull. U. S. G. $., No. 88, 

 p. 48. 



Description. "Test complanate, leaf-like, elongate, smooth, 

 broadest near the middle, tapering at the sides toward the anterior 

 and posterior ends by straight wedge-shaped lateral margins; 

 peripheral edges square ; one lateral surface slightly curved along 

 the median line, opposite surface approximately flat; chambers 

 10 to 12, narrow, elongate, nearly parallel to upper peripheral 

 edges; primordial chamber oval, elevated, marked by a median 

 ridge, mucronate ; apertue rotund, crenulated. 

 "Length, 2.82 mm.; breadth, i mm." (Bagg.) 

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



Geographic distribution. New Jersey. 





 Frondicularia lanceola Reuss. 



1865. Frondicularia lanceola, Reuss's Model No. 23 (Catalogue 



No. 46, 1861). 



1898. Frondicularia lanceola Bagg, Bull. U. S. G. S., No. 88, 

 p. 49. 



Description. "Test very elongate, lanceolate, tapering sharply 

 to an acute point at the primordial end; segments numerous, 

 12 or more, quadrangular in cross section ; septa depressed 

 sharply, so that the chambers appear elevated into oblique folds ; 

 surface smooth and glistening; peripheral margin limbate; ulti- 

 mate chamber extended into a distinct tube, which carries the 

 oral aperture; primordial chamber nearly circular, not elevated; 

 aperture radiate. 



"Length, 3 mm.; breadth, 0.6 mm." (Bagg.) 



