JO. ct- Summit, or nucleus. b. Margin of mouth, or Feristorroe. a The, inner or cdhurniOca lip. cL Outer lip. e Front edge, K f Binder edge of mouth, 
g. lice hollow axis or lonbiivcns. h, Spire, i First whorl, /a. Body whorl. 1. Suture', nv. Muscular impression, n ZorigituxUnal/ slit. o. (xdnmelleo. 
p. Dissepiment between the. Whorls. The, Farts of the various shells haring the same number or Letter' are similar. 
