75 
NUMMULARIA laevigata, 
TAB. DXXXVIII — fig. 1. 
Spec. Char. Lenticular, smooth, rather convex on 
both sides ; edge narrow ; whorls about 12. 
Syn. Nummulites laevigata. Lam. Env. de Paris , 
172. Hist . Nat. 7. 629. Parkinson , Org.Rem. 
3 . 152 $ 158. tab, 10./. 13 $ 14. Mantell, Geol. 
of Sussex, p. 269. 
The volutions in this species are very much compressed 
laterally; they amount to about 12: the surface is smooth, 
except a few rising punctums where the columns that pe- 
netrate it, or a harder substance than the rest of the shell, 
terminate ; the sides are most convex in the centre, and 
are besides irregularly a little waved ; the edge is blunt, 
and finely striated ; the shell is composed of perpendi- 
cular fibres with a semitransparent coat both within and 
externally ; when partially filled with spar, the fissure 
at the inner edge of the septum is not easily distinguish- 
able. 
J. Holloway, Esq. first discovered this fossil in En- 
gland, and forwarded specimens from Stubbington Cliff 
to Mr. Parkinson. The same gentleman soon after- 
wards met with it in Bricklesom Bay, Sussex, and very 
liberally supplied the specimens that have served for 
this illustration. It has also been found in various parts 
of the Continent. 
A section of one of the chambers, — to show the fissure 
behind the septum, the texture of the shell, and the stri- 
ated margin, — is shown magnified. 
