FROM THE TERTIARY OF VIRGINIA. 259 



Judging from description, this shell is not unlike the P. larvata, Con., from Claiborne, 

 but that species is not mentioned as having three folds on the columella, or the teeth on 

 the outer lip. 



P. ELABORATA, PL. 36. FIG. 64. 



P. testa elevato-conicd, crassd, imperforatd, costatd, striatd; spird minime ovatd, mamillatd; suturis linearibus, im- 

 pressis; anfractibus sex, convexis; costis longitudinalibus, crebris, planis, Itevibus^ politis; striis transversis, parvis; 

 anfractu ultimo rotundato; aperlurd ellipticd; columella plicis tribus magnis. 



Shell elevately conical, thick, imperforate, costate, striate; spire slightly ovate, mamillate; sutures linear, im- 

 pressed; whorls six, convex; costse longitudinal, numerous, flat, smooth, polished; striae transverse, small; last whorl 

 rounded ; mouth elliptical ; columella with three large folds. 



Length .15. Breadth .08 of an inch. 



Remarks. The transverse strise are very small and do not cross the ribs. The folds on 

 the columella are of nearly equal size, but the upper one is rather larger than the others. 



As the only two specimens of this shell in my possession have had the lower whorl 

 broken off, I am unable to give the full size or number of whorls, as well as to determine 

 whether there are teeth on the outer lip or not. 



I have never seen a Pyramidella with a sculpture as elaborate as this. The genus 

 mostly contains plain species. 



FAMILY SCALARID^E. 



GENUS SCALARIA. 

 S. ACICTJLA, PL. 36. FIG. 65. 



S. testa turritd, crassd, imperforatd. costatd; spird attenuatd, ad apicem vix l&vi; suluris profundis; anfractibus 

 septem, valde convexis; costis longitudinalibus, lamellaribus, acutis, ad lasim decrescentibus; anfractu ultimo rotun- 

 dato; basi c'arind minima transversd; aperturd rotunda. 



Shell turrited, thick, imperforate, costate, spire attenuate, nearly smooth at the apex; sutures deep; whorls seven, 

 very convex; costs longitudinal, lamellar, acute, decreasing at the base; last whorl rounded; base with a very small 

 transverse carina; mouth round. 



Length .20. Breadth .10 of an inch. 



Remarks. The carina on the base is small and does not interfere with the ribs, which 

 continue to the columella. The whorls are perfectly smooth with the exception of the 

 ribs, which, on the body whorl are fifteen in number. 



S. CORNIGERA, PL. 36. FIG. 66. 



S. testa elevato-conicd, scalariformi, imperforatd, crassiusculd, costatd; spird attenuatd, obtusd, conicd; suturis valde 

 impressis; anfractibus sex, convexis, superne valde angulatis; costis sub-tenuibus, planis, superne valde productis et 

 acute angulatis; basi Icevi; aperturd rotundatd, minime ejfusa. 



Shell elevately conical, scalariform, imperforate, rather thick, costate; spire attenuate, obtuse, conical; sutures 

 very much impressed; whorls six, convex, very angular above; costee rather thin, flat, very much produced and 

 acutely angled above; base smooth; mouth round, slightly effuse. 



Length .16. Breadth .08 of an inch. 



