340 SYSTEMATIC PALEOXTOLOGY 



Genus VAGINULINA Lamarck. 



Vaginulina legumex (Linne). 



Plate LXIII, Fig. 1. 



Nautilua legumen Liane, 1758, Syst. Nat., 10th Edit., p. 711, No. 248 ; 12th Edit., 

 17G7, p. 1164, No. 288. 



Vaginulina legumen Brady, 1884, Chal. Kept., vol. ix, p. 530, pi. Ixvi, flgs. 13-15. 



Vaginulina legumen Bagg, 1898, Bull. Amer. Pal., No. 10, p. 26. 



Vaginnlina legumen Bagg, 1898, Cret. Foram. New Jersey, Bull. 88, U. S. Geol. Sur- 

 vey, p. 52, pi. iv, fig. 4. 



Description. — Test nearly straight, pod-like, compressed, smooth, con- 

 sisting of only six chambers; septa liinbate, parallel, oblique, less dis- 

 tinct towards the distal end; ultimate chamber slightly prolonged at the 

 anterior end; aperture radiate; length, 0.80 mm. 



The genus Yaginulina is closely related to the ensiform varieties of 

 Cri stellar iae and to the less flattened form Marginulina, and from the 

 curved forms of Nodosaria from which it is separated by its broader 

 outline and marginal aperture. 



Brady states that it is widely distributed over present oceans and that 

 the genus reaches its greatest abundance in the ]!Torth Atlantic. The 

 species V. legumen is found at various depths down to 2000 fathoms 

 but it is commonest in shallow waters. 



Tate and Blake record this form from the Yorkshire Lias, Jones and 

 Parker include it in the forms from the Upper Trias (?) of Chellaston, 

 near Derby; Chapman records its occurrence from the Gault of Folke- 

 stone; Burrows, Sherborn and Bailey record it from the Bed Chalk of 

 Yorkshire, etc., and many other localities are elsewhere given. 



Occurrence.— AqviA Foemation. Brooks Estate near Seat Pleasant. 



Collection. — Johns Hopkins University. 



Genus MARGINULINA d'Orbigny. 



Maeginulina costata (Batsch). 

 Plate LXIII, Figs. 2, 3. 



Xdiii'dns iOrt/ioceras) co.stattis Batsch, 1791, Conchyl. des Seesandes, p. 3, pi. i, tigs 



1 a-g. 

 Marginulina coKtala Brady, 1884, Chal. Rept., vol. ix, p. 528, pi. ixv, figs. 10-13. 



Description. — Test rather stoutly built, irregularly costate and costae 

 curving a1)0ut the distal end; compressed but not strongly so; consist- 



