TROCHINIDJ;. 93 



one is perfect ; the lips of all of them are broken, hence the peristome, though described 

 above as reflected, is marked as doubtful. 



Since the discovery of the specimen of which our figure is a copy, we have obtained 

 many much larger, say three-eighths of an inch in diameter. 



Plate XIV. Fig. 7, Natural size. 



" la, Magnified vie7v, from abooc. 

 " lb. Outline, front vie?v. 



Locality. Stono beds, Simmons' ; Wadmalaw 



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



ADEORBIS.— Searlks Wood. 



' A D E K B I S N A U T I L 1 F R M I S . — {New Species.) 

 Plate XIV. Figs. 8, 8«, 86. 



Description. Shell depressly-conical, orbicular, nautiliform, thin, deeply umbilicated ; 

 whorls few, say two, angulated at the periphery, smooth, divided externally and regularly 

 into segments by transverse, depressed lines of growth, which are less distinct on the spire, 

 but profound on the base ; aperture transversely oval, contracted above ; peritome inter- 

 rupted ; umbilicus deep, simple; outer lip arcuate, thin ; inner lip sinuated. 



We are indebted to Dr. E. Ravenel for this interesting species, which may be readily 

 distinguished from its congeners by the depressed, transverse, arcuated and equidistant 

 lines, which divide the whorls into segments. 



Plate XIV. Fig. 8, Natural size. 



" 8a, Magnifed view, from above. 

 " 8^, Magnifed outline. 



Locality. Cainhoy, Wando River. 



Museicm, College of Charlestoti; Cabinet Dr. Ravenel. 



C U H L I L E I' I S r A 11 A S 1 T 1 U U S . — S T 1 M p .-5 o N . 

 Plate XIV. Figs. 9, 9ffl, <db. 



Cochliolepis parasiticus, Stimpson, Pro. Bost. So. Nat. Hist., 1857, Vol. 6, p. 307. 



Description. " Shell thin, discoidal, convex above, concave and umbilicated below ; 

 24 



