PLATE 22, 23. 
FIG. 4 , 5 . 
CONCHYLIOLITHUS Anomites (Pugms) subro- 
tundus, longitudinaliter sulcatus : siilcis obsolescen- 
tibus, valva imperforata glbbosa, margine undato : 
unda 5-plicata. S. p. 
A fossil shell. The original an Anomia. Perforate; the 
foramen or perforation very minute, (rarely visible) situate 
in the under part of the beak of the larger valve. Hinge 
curved, narrow (z. e. not patulous as in some of the square 
hinged Anomise). Both valves convex, roundish, sulcated 
longitudinally ; the furrows gradually becoming obsolete as 
they approach the beak. The imperforated valve gibbous 
near the margin ; the gibbosity divided by the above men- 
tioned furrows into five, rounded, prominent ribs. The 
larger valve hollowed into a single wave on the back, which 
terminates in a very large, deep, and somewhat square 
wave at the margin. The wave of the margin five-plaited. 
The beak is small, pointed, and incumbent. 
Common with the other Anomia, In limestone. 
Fig. 4, 5. Show the same specimen in different positions. 
