MIOCENE MOLLUSC A AND CEUSTACEA. 113 



Formation and localities: Mr. Conrad's original specimens are cited as 

 from the Choptank River, in Maryland. In New Jersey they appear to 

 come from Shiloh, Jericho, and near Bridgeton, and at the two former 

 localities are common. I have received them from the collection at Rutgers 

 College and from the National Museum — the latter having been collected 

 by Mr. Frank Burns. 



Family TEREBKID.E. 



Genus TEREBRA Brug. 



Terebra curvilineata. 



Plate xx, figs. 14-17. 



Terebra (Acus) curvilineata Conrad: Proc. Acad. Nat. Sci. Phila., vol. 1, p. 327; ibid 



vol. 1862, p. 565 5 Meek, Check List Miocene Foss., p. 18. 

 Terebra curvilineata (Conrad) Heilprin: Proc. Acad. Nat. Sci. Phila., 1887, p. 403. 



" Subulate, whorls with a revolving impressed line below and near the 

 suture; beneath this line the whorls are convex; ribs longitudinal, curved, 

 acute, dislocated by the impressed line ; revolving lines minute, crowded, 

 obsolete; columella sinuous. Length, 1 J inches. 



" Differs from Cerithiiim dislocation Say, in wanting the distant revolv- 

 ing lines, and the small dislocated portion of the ribs are [have] not a tuber- 

 cular form; the aperture is longer and narrower." (Conrad.) 



The resemblance between this and T. dislocata Say is so great as to 

 require a close scrutiny to distinguish between them. The difference 

 between the " revolving [spiral] lines" of Say's species and the extremely 

 fine spiral lines of this one being the most important distinction; while the 

 dislocation of the vertical ridges here can hardly be said to amount to an 

 interruption, as it often does in Say's species. 



Formation and locality : Only four specimens of this form have been 



obtained in the collections from the Miocene marls at Jericho, N.J. These 



belong to the National Museum collections, 

 mow xxiv—- 8 



