OF NEW TERTIARY FOSSILS. 117 



I found but one specimen of this fine shell, and cut off the base in digging it out of 

 the clay. 



The genus Melongena. has no affinity with the type of Pyrula. of Lamarck, 

 (FuLGUR of Montford.) Its true position will probably be among the Purpurin^. 

 I have referred to this genus the Fusus corona of Lamarck. The species have a 

 remarkable sinus at the upper end of the labrum. 



FUSUS. 



F. spiNiGER. PI. 11, fig. 32. — Fusiform, with revolving lines, and a series of elevated acute spines on the 

 angle of the large whorl ; the series continued on the whorls of the spire near the suture ; two upper 

 whorls entire ; sides above the tubercles flattened, with the revolving lines fine and indistinct ; 

 volutions seven ; beak produced ; labrum striated within. Length 1|. Very rare. 



It belongs to the genus Remifusus of Swainson. 



F. MississippiENSis. PI. 11, fig. 31. — Narrow-fusiform; volutions eight or nine, convex, with distant 

 profound, rounded ribs, and fine regular ornamental wrinkles ; canal much larger than the aperture ; 

 labrum striated within; beak narrow, produced, slightly bent. Length If. 



F. viCKSBUKGENSis. PI. 11, fig. 33. — Fusiform; whorls convex, with revolving raised lines alternated in 

 size, and fine longitudinal wrinkled lines ; large whorl ventricose ; beak somewhat bent. Length 1 {. 



FICUS. 



F. MISSISSIPPIENSIS. — Pyriform, thin and fragile, latticed, with acute prominent lines, the revolving 

 ones largest and distant, the interstices with minute revolving lines ; longitudinal lines closely 

 arranged, equal ; spire very short, whorls convex, the two nearest the apex entire ; large volution 

 flattened at top. Length I i. 



CHENOPUS. 



C. LiRATus. PI. 11, fig. 35. — Ovate, with a thick dilated labrum; whorls nine, convex, ribbed longi- 

 tudinally, and with revolving lines ; ribs curved, undulated on the body whorl and subnodose above ; 

 body whorl gibbous; aperture narrow; callus of the labium profound. Length |. Very rare. 



I have adopted the above generic name because as Phillipi observes the Pterocera 

 lamhis was made the type of the genus Apoorhais. 



RINGICULA. 



R. MISSISSIPPIENSIS. PI. 11, fig. 36. — Ovate acute, whorls five or six, convex, with minute revolving lines ; 

 suture profound, margin carinated by a submarglnal impressed line; columella two-plaited. Length 

 1-10. Abundant on Dr. Smith's plantation near Vicksburg. 



ACTtEON. 



A. ANDERSoNi. PI. 1 1 , fig. 37. — OWoug subovate ; whorls six, with regular impressed revolving lines, 

 interstices minutely striato-punctate ; spire acutely conical, whorls convex ; lines on the shoulder 

 indistinct; aperture about equal to half the length of the shell. Length 4-10. 



