Finger Lakes.—In central New York there is a series—a dozen or more in all—of long, nearly parallel lakes to which the general name Finger lakes is applied. Several of these, notably Cayuga and Seneca, are extremely long compared with their width. These lakes, although nearly parallel, are not strictly so, but converge slightly toward a common center at some point near the northern shore of lake Ontario, which lies immediately to the north. At present all these lakes, with the exception of one or two minute ones, drain northward and eventually enter lake Ontario mostly through Oswego river, which flows eastward for a distance and then turns abruptly northwestward after having received the waters of Oneida, the easternmost member of the series. Two or three smaller lakes on the western margin of the district empty into Ontario through the Genesee river. . . .