FOSSIL NAUTILI. Although the family Naul Riche dates from the Jurassic period, the genus Nauti lus is doubtfully referred to the Tertiary. The order Nautiloidea, however, originated as early as the Ordovician; the earlier types were straight and uncoiled, like Orthoceras. Very striking, says Hyatt, is the marvelously sudden rise of the Nautiloidea as a group: it reached its maximum in the Silurian. followed by a decline extending from the Devonian to the Triassic period. Then the forces acting unfavorably upon their existence were arrested. o• their violence lessened, and the group has liven affected by oil• very slight changes and an slow process of retrogression, until the present time.
BIBLIOGRAPHY. Owen, .11cMoir On filo.' Bibliography. Owen, .11cMoir On filo.' Pcarly Na u //his ( London, I S32 ) ; Par ker and Haswell. Text-book of Zoalogy (New York, 18981 ; Cooke, .110//usks (Cambridge Natural History, ib.,1895) ; Hyatt, in Zittel-Eastman. Text-book of Paleontology( ib.,1900) :Willey,"Pearly Nautilus" (Zoologir•ul licsiuts Based on Material front New Britain, New Guinea. etc.. Cambridge, England, 1902; vi., Zoology').
n2-viTO'. A city in Han cock County, 111., 12 miles north of Keokuk. Iowa ; on the Mississippi River, at the head of the lower rapids (Nap: Illinois. A 3). It is in a highly productive fruit-growing country, where the leading occu pations are wine-making and the culture and shipment of fruit for market, particularly grapes and berries. Saint Mary Academy, conducted by the Benedictine Sisters, is in Nauvoo. The most interesting features in this vicinity are the remains of the old Mormon buildings. Popula tion, in 1890. 1208; in 1900, 1321. N:111V00 was founded by the Mormons in 1840, and rapidly in creased in size until in 1846 it had a population of 15.000. In this year the settlement was broken up by the people in the neighborhood. (See MoamoNs.) An imposing temple, 130 feet long by 90 feet wide, left unfinished by the Mor mons, was destroyed partly by the in 1848 and partly by a tornado in 1850. In 1350 a company of French socialists, called learians (q.v.). under the leadership of M. Cabet, occupied Nauvo.), but their experiment proved a failure, and they abandoned the place in 1857.