lines, marked, figure, central, toward, represented, appears, columns, earlier, range, features, rapidly, former, upper, bands, recent, rapid, seven, previous, cover, irregular, respectively, strongly, raised, standing, indicated, plain, circle, twice, stands, indicates, exception, upward, contrast, depression, addition, conspicuous, widely, nearer, chiefly, appearance, interior, lies, repeated, width, explained, partly, base, illustration