MARYLAND GEOLOGICAL SURVEY 175 



ScAPHELLA (Aurinia) ty^pus (Coiirad), 

 Plate XLIV, Fig. 10. 



Valuta mutabilis Conrad, 1842, Proc. Nat. Inst., BuU. ii, p. 182. 

 Volutifusus typns Conrad, 1866, Amer. Jour. Conch., voL ii, p. 67, pL iii, fig. 3. 

 Vohctifusus typns Tryon, 1882, Manual of Conchology, vol. iv, p. 77, pi. iii, fig. 31. 

 Scaphella {Aurinia) virginiana Dall, 1890, Trans. Wagner Free Inst. Sci., vol. iii, 



pt. i, p. 80. 

 Scaphella {Aurinia) virginiana Dall, 1892, Trans. Wagner Free Inst. Sci., vol. iii, 



pt. ii, p. 227. 

 Scaphella typus Harris, 1893, Amer. Jour. Sci., ser. iii, vol. xlv, p. 24. 

 Scaphella (Aurinia) virginiana Cossmann, Essais de Paleoconch. Comp., vol. iii, 



p. 128, pi. vi, fig. 3. 



Description. — "Fusiform, thick in substance; whorls 6, besides the 

 initial one, slightly concave above, with an angle near the suture, ob- 

 scurely plicated; labrum thick near the summit, with an acute margin; 

 columella with two distinct, little prominent folds; beak sinuous." 

 Conrad, 1866. 



This species shows great variation in proportional dimensions, curve 

 of the beak, and size of the columella plaits. The plaits are much 

 stronger on the specimens from Jones Wharf than on those from Plum 

 Point. They stop abruptly on reaching the mouth. The surface is 

 covered with faint revolving striae. 



Dr. Dall says that the name Uj^ns is " inapplicable," " misleading," 

 '' contrary to fact," and " cannot be retained." I do not recognize that 

 a well-established and accepted specific name can be changed for the 

 reasons quoted above ; but if it can, the name virginiana is equally " mis- 

 leading," " inapplicable," etc., when applied to a fossil which has been 

 reported only from Maryland and North Carolina, and must also be re- 

 jected. In that case I propose the name Conradiana. 



Length, 85 mm,; diameter, 40 mm. 



Occurrence. — Choptank Formation. Jones Wharf, Governor Run. 

 Calvert Formation. Plum Point, Chesapeake Beach. 



Collections. — Maryland Geological Survey, Johns Hopkins University, 

 U. S. ISTational Museum, Philadelphia Academy of Natural Sciences, 

 Cornell University. 



Scaphella (Aurinia) obtusa (Fmmons). 

 Plate XLIV, Fig. 11. 



Voluta obtusa Emmons, 1858, Rept. N. Car. Geol. Survey, p. 263, tig. 141. 

 Valuta abtusa Conrad, 1863, Proc. Acad. Nat. Sci. Phila., vol. xiv, p. 563. 



