366 CRETACEOUS PALEONTOLOGY. 



Marlboro (131), near Walnford (148, 149, I47 4 , 195), near 

 Jacobstown (150), near Mount Laurel (166), Mullica Hill 

 (i6 9 2 ). 

 Geographic distribution. New Jersey. 



Terebratella vanuxemi (Lyell and Forbes). 

 Plate XXVII., Figs. 12-13. 



1844. Terebratula Vanu&emi L. & F., Proc. Geol. Soc. Lond., 



1844, p. 308, with figures. 



1845. Terebratula Vanuxemiana L. & F., Quart. Jour. Geol. 



Soc. Lond., vol. i, p. 62, three text figures. 

 1861. Terebratella Vanuxemiana Gabb, Proc. Acad. Nat. Sci. 



Phil., 1861, p. 19. 

 1861. Terebratella, Vanuxemi Gabb, Synop. Moll. Cret. Form., 



P- 250 (194). 

 1864. Terebratella Vanuxemi Meek, Check List Inv. Foss. N. 



A., Cret. and Jur., p. 5. 



1868. Terebratella Vanuxemi Con., Cook's Geol. N. J., p. 724. 

 1886. Terebratella Vanuxemi Whitf., Pal. N. J., vol. I, 



(Monog. U. S. G. S., vol. 9), p. 14, pi. i, figs. 1-4. 

 1892. Terebratella Vanuxemi Rollick, Trans. N. Y. Acad. Sci., 



vol. n, p. 98, pi. i, fig. 6. 



Description. Shell subovate in outline, pointed posteriorly 

 and rounded anteriorly, each valve marked by from 15 to 23 

 rather faint, rounded plications, some of which divide in passing 

 from the beak to the front margin ; longer than wide, the dimen- 

 sions of two individuals being: length, 16 mm., 11.5 mm. ; width, 

 14 mm., ii mm.; thickness, 8.5 mm., 5.2 mm. Pedicle valve 

 rather strongly convex, usually somewhat flattened along the 

 median line, with a small, nearly erect beak, the cardinal area 

 of moderate size, sharply defined, slightly concave, with a broad 

 delthyrium partially closed by a pair of deltidial plates, leaving a 

 large foramen. Brachial valve depressed convex in younger 

 individuals, becoming more convex with age, so that in some 

 old examples the convexity is almost as great as that of the 

 pedicle valve, usually with a more or less ill-defined mesial flat- 



