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numerous and rather sharp. Whorls about eight. The 
extension of the lip upon the spire is wanting in very 
young specimens, but even in them the lip is often thick- 
ened ; when about half grown the extension reaches across 
one or two whorls, and when full grown it approaches 
almost to the apex finishing with a curve. The back is 
straight with the axis of the spire. 
I do not know that this species is found any where but in 
the Clay at Barton Cliff, where it is abundant. There is a 
French fossil very nearly resembling this, called Strombus 
fissurella by Linn, and Rostellaria fissurella by De Lamarck, 
but in that the ribs are less numerous, the striae only at the 
base, and the axis arched, the whole giving a peculiar 
character immediately perceptible upon comparison. The 
French shells are found abundantly at Grignon near Paris; 
they are more delicately preserved, of a whiter color, and 
are very brittle. The English shell has a more recent 
appearance, with an horn-like transparency, and darker 
color. Brander’s figure is from a larger specimen than 
I have been lucky enough to meet with. 
Linneus’s recent Strombus fissurella should be carefully 
compared with these fossil species, it may possibly prove 
distinct. I was favored with some as if gathered before they 
had been exposed to bleach or change, consequently more 
like recent ones than usual, by the attention of Miss Pratt, 
