OHIO.
(Map [25].)
1. Urbana, Champaign County.—At Urbana, Ohio, in the possession of Mr. Charles McDarg, the writer has seen a skull of Symbos cavifrons which had been found on the farm of Ed. Jennings, while a ditch was being dug. It was buried in mud at a depth of 10 feet. This region is covered by the Wisconsin drift, and the animal must have lived not long after the ice had withdrawn from the neighborhood.
2. Youngstown, Mahoning County.—In the geological collection of the Ohio State University is a part of a skull of Ovibos moschatus secured at Youngstown. The specimen shows the base of the skull and the forehead. Between the bases of the horns is a narrow channel, characteristic of Ovibos. The specimen shows the effects of abrasion, the horn-cores being worn down to their bases. The specimen is said to have been found in gravel at a depth of 60 feet. It appears to have been presented in 1890 by H. McGinnis. It is probable that this skull was found along Mahoning River, but the elevation was, unfortunately, not given. The probability is that the deposits inclosing the fossil were laid down during the Wisconsin stage.
According to Leverett (Monogr. U. S. Geol. Surv., XLI, p. 149), the old trough of Beaver River was filled with gravel during the Wisconsin glacial stage, and this filling is now in process of excavation. The same is probably true of its tributary, the Mahoning. If the skull was buried in this gravel its age is thereby determined.
3. Trumbull County.—In 1853 (Smith. Contrib. Knowl., vol. V, art. 3, p. 16), Leidy stated that he had received, for inspection, from Professor Samuel St. John, of Hudson, Ohio, a fragment of a skull, with one horn-core attached, which had been found in Trumbull County. No further details were given as to the locality or of the geological conditions. The skull appeared to be much water-worn. It belongs to Symbos cavifrons. Trumbull County is wholly occupied by Wisconsin drift. The animal is, then, probably to be credited to the Late Wisconsin. It is possible, however, that this skull was found in an older deposit exposed in the valley of some stream.