PLATE 29. 
A MASS OF ANOMITA:. iJMESTONE. 
The limestone, in some parts of Derbyshire, appears to 
have been formed wholly of shells. Beds of them may 
frequently be traced of several miles in extent. — The stra- 
tum, from which the mass, figured in the adjoining plate, 
was broken, consists almost entirely of one species of 
Anomite, (see fig. 1, plate 36) with scarcely a fragment of 
any other shell — The whole is a hard, grey, scaly lime- 
stone, similar to that in which the Entrochi are commonly 
imbedded. 
