PLATE 32, 33. 
ANOMITjE. limestone. 
FIG. 1, 2, 3, 4. 
CONCHYLIOLITHUS Anomites (semireticulatus) 
scmiorbiculatus, valva plana decussatem striata, altera 
gibbosa longitudinaliter striat^, natem versus trans- 
verslm rugosa. S, p. 
A petrified shell. The original an Anomia. Imperforate, 
with one valve concave, the other convex, the hinge 
straight and extended. The general form, or outline of the 
shell semiorbicular. The concave valve reticulated, with 
prominent and somewhat uneven stride. The convex valve 
gibbous, generally marked on the back by a slight concave 
wave, and longitudinally striated ; the stride rude, strong, 
and unequal; near the beak, transversely wrinkled, which 
gives the valve a semireticulate appearance : towards the 
margin, the strlaa are destitute of wrinkles; but, for the 
most part, are dichotomous or forked. The beak is small 
and pointed, and rarely curves much over the hinge. A 
variety of this shell occurs with the sides extended, as in 
C. A. giganteus. (Tab. 15.) 
Common in most parts of Derbyshire where limestone 
is found. 
