MOLLUSCA. 709 



the shell are best shown. The form of the aperture of the shell 

 has not been observed, so that the generic relations of the shell 

 cannot be determined with certainty; it seems likely, however, 

 that it is not a true Cerithium. 



Formation and locality. — Merchantville clay-marl, Lenola 

 (163), Merchantville (162). 



Geographic distribution.— -'New Jersey. 



Family APORRHAIDAB. 



Genus Anchura Conrad. 

 Anchura rostrata (Gabb). 



Plate LXXXL, Figs. 7-9. 



i860. Rostellaria rostrata Gabb, Jour. Acad. Nat. Sci. Phil, 2d 



ser., vol. 4, p. 390, pi. 68, fig. 7. 

 1 861. Gladius rostratus Gabb, Synop. Moll. Cret. Form., p. iii 



(55)- 

 1864. Anchura (Drepanochilus) rostrata Meek, Check List Inv. 



Fobs. N. A., Cret. and Jur., p. 19. 

 ■1868. Anchura rostrata Con., Cook's Geol. N. J., p. 729. 

 1875. Rostellaria rostrata Con., Kerr's Geol. N. Car., App., p. 



12. 

 1892. Alaria rostrata Whitf., Pal. N. J., vol. 2 (Monog. U. S. 



G. S., vol. 18), p. 119, pi. 14, figs. 5-6. 

 1905. Alaria rostrata Johns., Proc. Acad. Nat. Sci. Phil. 



(1905), p. 23. (Not Anchura rostrata Con., Kerr's 



Geol. N. Can, App., p. 12, pi. 2, fig. 28.) 



Description. — "Shell of only moderate size; spire elevated, 

 foiTning an apical angle of about 35", but somewhat variable in 

 different specimens; whorls about six in number, very slightly 

 convex between the sutures, which are not very strongly marked, 

 and are ornamented by rather closely- arranged vertical folds, 

 smaller, more numerous, and more closely arranged on the upper 

 than on the body whorl ; those on the last whorl become smaller, 

 shorter, and more indistinct toward the expanded lip, on the back 



