P Y 11 A MIDELLID^E. 



S7 



transverse, flat, regularly nodulous, a smooth one near the lower suture; last whorl 

 rounded; hasecostate; perforation very small; mouth ovate, angular above, somewhat 

 effuse; fold on the columellar large, acute. The nodules on the ribs are small, and in 

 regular order, giving the shell a granulate and cancellate appearance. The fold on the 

 columellar is placed about the middle, and is quite large; the mouth is rounded below, 

 and acutely angular above. On the body-whorl the ribs are about eight in number, 

 while there are five on those of the spire. The basal costs; are smooth and smaller."— 

 H. C. Lea. 



The fossil, as figured by us,' has four of the spire-ribs granulated, and one smooth. 

 The above description of Mr. Lea's characterizes it as identical with his species from the 

 Meiocene of Virginia; but his figure is very unlike that of the Post-Pleiocene shell, 



Plate XIII. Fig. 11, Natural size. 

 " 11a, Magnified. 

 " lib, Magnified costce. 



. Locality. Cainhoy, Wando River. 



Museum, College of Charleston; Cabinet F. S. H. 



TURBOX1L L A SUB-CO R N A T A . — ( New Species. ) 



Plate XIII. Pius. 12, 12a, 126. 



Description. Shell subulate, acuminate, thick, imperforate, costate ; spire attenuate, 

 mammillate, smooth at apex ; two first whorls striate ; five lower whorls angulate, granu. 

 late, transversely grooved, sub-coronated below the sutures ; columellar with a small, 

 almost obsolete fold ; the spiral ribs of the lower whorls are seven in number, crossed by 

 transverse revolving grooves, which gives the shell a regularly granulate appearance ; 

 the granulations of the superior rib, below and next the sutures, are large ; the revolving 

 line below the suture is more deeply impressed than the others. 



Plate XIII. Fig. 12, Natural size. 

 " 12a, Magnified. 

 " 12Z>, Grariulated whorl. 



Locality. Simmons'. Museum, College of Charleston; Cabinet F. S. H. 



