286 PROCEEDINGS OP THE ACADEMY OF 



MANGELIA* Leach. 



Mangelia Virginian a. Short-fusiform ; whorls 5, subscalariforin, or 

 medially angular ; ribs prominent, two whorls from the apex smooth ; mimit- 

 revolving lines on the lower half of the penultimate whorl ; one or two obsolete 

 revolving lines on the body whorl. 



Locality. Yorktown, Virginia. 



PETRICOLWJE. 



PLEIORYTIS, Conrad. 

 Equivalve, ovate or oval, with radiating striae, gaping posteriorly ; hinge of 

 right valve with two widely diverging teeth ; left valve with one direct thick 

 triangular, bifid tooth under the apex, and an oblique compressed tooth pos- 

 teriorly ; sinus of pallial impression extending beyond the middle of the 

 valves ; muscular impressions large. (Miocene.) 



P. ovata. Ovate, compressed, very inequilateral, thin, radiately striate, 

 strife numerous, undulate or irregular, crossed by wrinkled fine lines ; car- 

 dinal teeth prominent. 



Proportionally longer, more compressed and inequilateral than P. cente- 

 n a r i a, and with narrower hinge teeth. 



Locality. Day's Point, James River, Virginia. 



FASCIOLARIIDsE. 



BUSYCON, Bolten. 



1. B. carinatu m. Fusiform ; whorls 6 ; spire elevated ; whorls angular, 

 angle situated below the middle of the whorls, cariuated, carina tuberculated, 

 sides of volutions above the angle straight and very oblique, surface trans- 

 versely striated ; lines rugose, unequal, obsolete on the middle of last whorl ; 

 columella and canal sinuous. 



Locality. Virginia. 



2. B. filosum. Pyriform, thick, lineated, lines revolving, close, fine, un- 

 equal, rugose ; spire short, scalariform, spinose on the angle, spines foliated ; 

 columella twisted, sinuous ; last whorl obliquely ridged ; canal long, sinuous. 



Locality. Yorktown, Virginia. 



Resembles B. gibbosum, C, (Kiener, Conch, pi. 9, fig. 2.) but has 

 shorter spines, finer strife and more scalariform spire. That is a recent 

 reversed species, but the fossil has been found dextral only. Rather common 

 at Yorktown. The spire in some specimens is short and hardly scalariform, 

 but the revolving ridge on the lower part of the body whorl distinguish^-' this 

 from the other Miocene species. 



FASCIOLARIA, Lam. 



Subgenus Lirosoma, Conrad. 1862. 



Subpyriform ; ribbed, beak narrow and produced, slightly recurved ; one 

 long, very oblique plait at the angle of the columella. 

 Fasciolaria (Fusus) sulcosa, Conrad, Foss. Med. Tert. 



Subgenus Tekebraspika, Conrad. 1862. 



Spire elongated, whorls angular; plaits concealed or not reaching the onter 

 edge of columella. 



Fasciolaria elegans, Emmons, Geol. N. C. 



BUCCINIDjE. 



TRITIA, Risso. 



T. scalar is. Ovate-acute; spire elevated, turrited ; whorls 7, \oa.%\- 



