TO GEOLOGY. 203 
Monoptygma elegans. Plate 6. Fig. 217. 
Description. Shell ovately elliptical, transversely and 
closely furrowed ; furrows closely set with punctures ; 
substance of the shell thin ; spire ——; columella furnish- 
ed with rather a small oblique fold; mouth elliptical, 
effuse at base ; outer lip sharp. 
Length.... Breadth 3-20ths, of an inch. 
Observations. This very interesting shell, in its general 
form, does not very closely resemble the M. Alabamiensis* 
(nobis) ; the single fold on the columella alone, would 
cause them to be recognized as the same genus. In the 
elegans the numerous punctured striz resemble closely the 
Acteon punctatust (nobis). Having buta single specimen, 
the superior whorls of which are deficient, the description 
has to be necessarily defective. 
The Eocene of Claiborne, like the London Clay of 
England, has presented remains of other classes than the 
Conchifera and Mollusca. In the sand was found a part of 
the pincer of a Cancer—two small vertebra, probably of a 
fish—a stony substance resembling a section of what 
Brander figures under the name of Palatiwm Piscitum{t—a 
stony substance, somewhat resembling in form the elliptical 
bone, found in the head of fish—teeth of sharks of several 
different species—the spine of a fish, and a curious tooth 
* See page 186. + See page 111 
t Fossilia Hantoniensia, pl. 9, fig. 117. 
