PLATE 32, 33. 
Fig. 1, 2. Show the same specimen in ditFerent positions. 
3. A smaller specimen. 
4. An Impression, on limestone, of the concave valve. 
Impressions of the concave, or flat valves, of the Imper- 
forate Anomite, are often found detached from the petri- 
tactions themselves ; and, as they exhibit a convex surface, 
are liable, without some attention, to be mistaken for dis- 
tinct species. 
FIG. 5, 6, 7, 8. 
CONCHYLIOLITHUS Anomites ( acumhiatus ) cor- 
diformis lasvis, sinu margine longissimo cuneato. 
S. p. 
A petrified shell. The original an Anoviia. Perforate; 
both valves convex, cordiform or heart-shaped, and smooth; 
the surface being destitute of strias*, furrows, or tuber- 
cles. The hinge curved, and close. Foramen very minute; 
under the apex of the beak, which is small, sharp-pointed, 
and Incumbent. The larger, or beaked valve, hollowed at 
the back Into a single wave, ending in a very long, sharp- 
* The larger specimens, under a glass, appear to be marked with very 
minute, close, and equal striae. 
