OF THE UNITED STATES. 49 
Specific character. Shell depressed, convex above; whorls 
four, rounded; suture indented; umbilicus very patulous. 
Diameter, an inch and one-fourth. 
From Prairie Bluff, Alabama. 
2. N. abyssina, (S.G.M.) PI. xiii. fig. 13. 
Specific character. Shell with a flattened spire; suture chan- 
~ nelled; body whorl large, obtusely rounded; umbilicus patu- 
lous; aperture not expanded, longitudinally elliptical. 
Diameter, three-fourths of an inch. 
From Prairie Bluff, Alabama. 
CIRRUS. 
C. crotaloides, (S. G. M.) Pl. xix, fig. 5. 
Specific character. Shell with four or five rounded volutions, 
much excavated at the sutures; spire convex; the two first 
whorls suddenly produced. 
Mr. Conrad found a single specimen at Erie, Alabama, 
in the older cretaceous deposits. 
Conus. 
C. gyratus, (S.G. M.) Pl. x, fig. 13. 
Specific character: Spire elevated, with about five promi- 
nent volutions. 
Length, one inch. 
Of this species I possess a solitary cast, from the 
calcareous beds of South Carolina. I name and figure it 
on account of its being the first and only appearance of 
this genus in the strata now under consideration. It was 
found by Mr. Conrad. 
} G 
