PLATE 38, 39, 40, 41. 
P. 41 — FIG. 5 . 
CONCHYLIOLITHUS N. Ammonites (ingens) an- 
fractlbus subextrinsecis teretibus la^vibus, ambitu 
integro, dissepimentis integris. S. p. 
A fossil shell. The original a Nautilus ; spiral, depres- 
sed. (Syst. G. 6. Tam. Animonita.) Volutions three, 
nearly external, even, round, and gradually tapering to 
the centre, which is hollow or sunk beneath the level of 
the outward whirl. Ambit entire. Dissepiment entire, ob- 
lique, slightly waved. The structure of the siphuncle 
unknown. 
Found near Ashford, Limestone. 
This is the largest of the Ammonita. yet discovered in 
Derbyshire. The specimen represented is about twice the 
size of the figure. 
