TROCHINID^. 



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 view, from above. 

 " lb, Outline, front view. 



Locality. Stono beds, Simmons'; Wadmalaw 



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



ADEORBIS.— Searles Wood. 



ADEORBIS N A U T I L I F R M I S . — (New Species.) 

 Plate XIV. Figs. 8, 8a, 8b. 



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 eciuidistant 

 lines, which divide the whorls into segments. 



Plate XIV. Fig. 8, Natural size. 



" '8a, Magnified view, from above. 

 " 8b, Magnified outline. 



Locality. Cainhoy, Wando River. 



Museum, College of Charleston; Cabinet Dr. Ravenel. 



OOCHLIOLEPIS PARASITICUS. — Stimpson. 



Plate XIV. Figs. 9, 4a, 9b. 



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



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

 24 



