132 MR. CONRAD'S DESCRIPTIONS 



N.PARiLis. PI. 14, fig. 31. — Ovate, ventricose, with concentric lines ; beaks medial ; anterior end pointed, 

 angular ; posterior end regularly rounded; anterior submargin carinated, hinge margin very oblique, 

 straight from the apex, except near the end, where it is somewhat angulated. 



Locality. Upper Marlborough, Maryland. 



LITHODOMUS. 



L. CLAiBORNENSis. PI. 14, fig. 27.^Very thin and fragile, inflated ; posterior hinge margin obliquely 

 truncated, the extremity regularly rounded ; lines of growth distinct. 



Locality. Claiborne, Alabama. 



CERITHIUM. 



C. soLiTARiuM. PI. 14, fig. 28. — For description see Vol. vii. p. 147. 



C. NAssuLA. PI. 14, fig. 29. — For description see Vol. vii. p. 156. 



C. CLAIBORNENSIS. PI. 14, fig. 32. — Turretcd, with longitudinal oblique crenate ribs and obscure revolving 

 lines ; body whorl without ribs, and having in place of them a few indistinct lines ; near the suture is 

 a series of prominent tubercles ; angle towards the base bicarinate ; base flattened, and having two fine 

 revolving lines. 



Locality. Claiborne, Alabama. 



A fragment only was found, which the figure represents. 



FUSUS. 



F. PACHYLEURUS. PI. 14, fig. 25. — ^For description see Vol. viii. p. 190. 



MITRA. 



M. TEREBR^FORMis. PI. 14, fig. 30. — Subulate ; whorl eight or nine, slightly convex, with obtuse 

 longitudinal varices and sharp equal prominent revolving lines, four in number on each whorl of the 

 spire ; beak very short ; labrum dentate within. 



Locality, Claiborne, Alabama, 



