VOLUTID^E. 79 



Bulla canaliculata, L. R. Gibbes, Tuomey's Geol. So. Ca., appendix, p. xx. 



Bulla canaliculata, Stimpson, Shells of New-England, p. 50. 



Tornatina cylindrica, Emmons, North-Carolina Geol. Survey, 1858, p. 272. 



Description. Shell nearly cylindrical, white, with faint lines of growth, or obsolete 

 wrinkles ; spire slightly elevated, mammillated at apex ; volutions about five, summit of 

 each with a shallow obtuse groove ; aperture elongated, narrowed above ; labrum thin, 

 arcuated, inner lip with a thin plate of enamel, and an oblique fold near the base; base 

 widely and regularly rounded. 



This shell is recent upon the coast from Massachusetts southward, and very abundant 

 in the Post-Pleiocene ; from one locality we have collected several thousand specimens. 

 Dr. Gould's obstricta is to our mind only a variety of canaliculata, the elevated spire 

 is by no means uncommon. 



Plate XII. Fig. 11, Natural size. 

 " 11a, Magnified. 



Locality. Simmons'; John's Island. 



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



VOLVA.— Bolton. 



VOLVA ACICULARIS. — H. & A. Adams. 

 Plate XII. Fig. 13. 



Ovula acicularis, Lam., Wood's Index, pi. xviii, fig. 7. 



Ovula acicularis, Ravenel, Cat. Coll. Shells, p. 18. 



Ovula acicularis, L. R. Gibbes, Tuomey's Geol. So. Ca., appendix, p. xxi. 



Volva acicularis, H. $ A. Adams, Gen. Mollusca, Vol. 1, p. 272. 



Description. Shell fusiform, ventricose, smooth, convolute, extremities prolonged into 

 channeled beaks ; labrum thickened the entire length; columellar smooth, but with a 

 thickened ridge or longitudinal fold, which is most prominent below the inflated part of 

 the whorl ; aperture semi-lunar. 



Plate XII. Fig. 13. 



Locality. Simmons'; Charleston. 



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



