Nummdlite, Nummulites
NUMMDLITE, NUMMULITES, A. d'Orbigny's name for a genus of Perforate Foraminifera (q.v.), distinguished by the flattened, lenticular discoid shell of many turns, finely perforated ; chambers subdivided by incomplete septa into squarish chamberlets. This genus is especially abundant in Eocene Limestones, which attain great thickness around the Mediterranean basin; the Pyramids of Egypt are built of it.
Note - this article incorporates content from Encyclopaedia Britannica, Eleventh Edition, (1910-1911)