344 THE MEDALS OF CREATION. Cuap. X. 
tertiary formations of North America,* and the Nummu- 
lina, commonly termed Vummutites, of Europe, Lign. 110. 
We will now describe the genera selected for illustration, 
commencing with the large and well-known type, whose 
aggregated remains form extensive beds of crystalline lime- 
stone in the Alps, and in Asia, and Africa,t 
Lien. 110. NUMMULITES, oR NUMMULINA; nat. 
From the Great Pyramid of Egypt. 
Fig. 1.—Transverse section of a NuMMULITE, showing the form and 
arrangement of the cells. 
2, 3.—Specimens with part of the external plate removed. 
NumMULINA LAVIGATA. Jagn. 110.—The shell is of a dis- 
coidal or lenticular form, composed of numerous cells, con- 
centrically arranged round an axis on the same plane; both 
sides of the disk covered by a smooth thick plate. 
Under the name of Nwmmulites, from their resemblance 
to a piece of money, the fossil shells of this genus of Fora- 
minifera have Jong been known to naturalists, and are figured 
* Dr. Morton’s Synopsis of the Organic Remains of the Cretaceous 
group of the United States. Philadelphia, 1824, p. 45, pl. v. fig. 9. 
+ Geol. Journal, vol. v. 
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