p. 3

Monoceras sulcatum Lea,
Cont. to Geol. p 163 pl 5 fig 168.

Shell turbinate, inflated, transversely furrowed over the whole surface, substance rather thin; transverse furrow linear with indistinct angular points; suture rather small; whorls convex; umbilicus none; mouth ovate, narrow; columella smooth; outer lip sharp.

D. 0.2

Eocene Tertiary
Claiborne Alab.