234 CRETACEOUS PALEONTOLOGY. 



three are inrolled and rounded at the base; segments becoming 

 more definite above; ultimate chamber largest and slightly pro-- 

 longed; aperture small, rotund, crenulate; septa depressed, 

 slightly oblique, though not markedly so. 



"Length, i mm." (Bagg.) 



Formation and locality. Marshalltown clay-marl, Marshall- 

 town (Bagg). 



Geographic distribution. New Jersey. 



Marginulina trilobata d'Orbigny. 



1840. Marginulina trilobata d'Orbigny, Mem. Soc. geol. France, 



ser. i, vol. iv, p. 16, pi. i, figs. 16, 17. 

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



P- S^. 



Description. "Test elongate, smooth, and glistening, com- 

 pressed laterally, slightly arcuate at the primordial end; some- 

 what tapering; chambers short, oval, regular, numerous, 10 to 

 1 6, slightly constricted; surf act marked by small, distinct, 

 elliptical ridges, giving the form a peculiar trilobed appearance, 

 whence its name ; primordial chamber small, nearly spherical ; 

 septal lines depressed; aperture small, radiate. 



"Length, 4 mm. in large specimens ; breadth, 0.6 mm." (Bagg.) 



Formation and locality. Marshalltown clay-marl, Marshall- 

 .town (Bagg) ; Navesink marl, Freehold (Bagg). 



Geographic distribution. New Jersey. 



Genus VAGINULINA d'Orbigny. 



Vaginulina legumen (Linne). 



Plate II., Fig. 33. 

 1758. Nautilus legumen Linne, Syst. Nat., tenth ed., p. 711, 



No. 248; 1767, twelfth ed., p. 1164, No/288. 

 1891. Vaginulina legumen Terrigi, Memoire R. Com. g. Regno, 



vol. iv, pt. i, p. 94, pi. iii, fig. 6. 



1895. Vaginulina legumen Bagg, Johns Hopkins Univ. circ., 

 vol. 15, No. 121, p. 12. 



