I have examined and compared specimens from the St. Lawrence and Indian rivers, New York. Lake Erie, the Wisconsin lakes, Lake Pepin, Chautauqua and Conneaut lakes, Scioto and Mahoning rivers, in Ohio, and have seen preserved heads of large ones from Ohio, Kentucky, and Tennessee, and found that they all agree so well in the number of branchiostegals, squamation of cheeks and opercles, in dentition, fins, and in measurements, that they must all be considered as one and the same species. At the Chicago Columbian Exposition there were some twenty very large specimens of mounted skins from Canadian waters, in the exhibit of the Ottawa Museum, which showed well the variation in markings. Some still showed the dark spots on a gray ground; others were more or less distinctly barred with broad or narrow bands; others showed both bars and diffuse spots; and still others were of a uniform slate or grayish coloration, without markings of any kind. In the museum of the Cuvier Club, in Cincinnati, there are quite a number of mounted skins of mascalonge from the Wisconsin lakes, mostly large ones, that also show all of the various markings, as well as those of a uniform coloration. About 1890 I donated to the Cincinnati Society of Natural History a specimen from Lake Erie; and in 1892 I donated to the United States National Museum two specimens from Lake Erie, and one from a tributary of the Muskingum River, in Ohio. All of these Ohio fish were from eighteen inches to two feet long, and all showed similar markings, being profusely covered with round black spots from an eighth to a quarter of an inch in diameter. Where the spots become diffused, and the bands are inclined to spread and coalesce, they are always more distinct toward the tail. In a mascalonge of less than a foot in length the spots are very black, very round, and quite small, not exceeding a sixth or an eighth of an inch in diameter.