264 AMERICAN JOURNAL 



P. HARPULOIDES. — PI. 19, fig. 7. 



Proceed. Acad. Nat. Science. 1843, p. 308. 

 Locality. — Petersburg, Va. 



Subgenus TRITIARIA, Con. 



Description. — Elongated, subturrited, labrum not thickened 

 within. 



P. PERALTA. — PI. 19, fig. 5. 



Description. — Elongated, turrited, whorls 8, longitudinally 

 ribbed and with revolving impressed lines, about 5 in number on 

 the penultimate volution ; above near the suture on all the 

 whorls there is a broader impressed line, which divides the ribs 

 and forms a tuberculous ridge around the summits of the whorls ; 

 ribs narrow, numerous ; spire acuminate. 



T. trivittata, Conrad, (not Say.) Proceed. Acad. Nat. Science, 

 1862, p. 562. 



TRITONIID^. 

 BURSA, Bolten, 1798. 

 Ranella, Lam. 

 B. CENTROSA. — PI. 21, fig. 10. 



Description. — Turritted ; spire elevated ; whorls with granu- 

 lated revolving unequal lines, and a series of rounded, promi- 

 nent, closely arranged nodes on the angle which is situated below 

 the middle of the whorls ; body whorl with three distant nodular 

 revolving ribs, the lower one small ; columella with transverse 

 irregular plaits. 



Locality. — Charles Co., Md. Prof. Cope. 



MURICID^. 



BUCCINOFUSUS, Conrad. 



Description. — Fusiform longitudinally undulato-co state ; re- 

 volving ribs prominent, distant, narrow, with intermediate lines ; 

 columella concave, entire ; siphonal canal widest at base ; beak 

 not produced, shorter than the spire, slightly recurved ; labrum 

 sulcate within ; sulci corresponding to the external ribs. 



Fusus PARILIS, Conrad. Tert. Foss. 



This genus contains but few species, and originated in the 

 Miocene formation. Perhaps Fasus siilcatus, Lam. ; may 

 be a recent species. The form of the shell is more that of 

 a Fasciolaria than a Fusus, but the columella is entire. There 



