Under this number may be recorded the discovery of mastodon teeth in a well sunk at Mount Washington, about 8 miles east of the central part of Cincinnati (Fuller and Clapp, Water-Supply Paper 259, 1912, p. 27). The teeth were found in coarse gravel, which lies only 15 feet from the surface, and is overlain by old till and loess. The indications are that the age of the mastodon is early Pleistocene. IN AREA OF WISCONSIN DRIFT. 4. _Amanda, Butler County._—In the collection of the Philadelphia Academy of Sciences the writer has seen 2 teeth of a mastodon, probably of the same individual, which are labeled as having been found on Dick’s Creek, Butler County. This creek is in Lemon Township, and flowing westward, empties into the Miami near Amanda. The teeth are credited to W. S. Vaux. No details regarding the circumstances of discovery are recorded. The locality is south of the Germantown moraine. 5. _Germantown, Montgomery County._—In 1875 (Cin. Quart. Jour. Sci., vol. II, p. 154), Mr. J. H. Klippart reported that some years before that time an account had been published in the Dayton Journal of the finding of teeth, tusks, and some other parts of the skeleton of a mastodon near Germantown. It is not known whether any competent person identified these remains, nor what has become of them. In 1870 (Amer. Jour. Sci., ser. 2, vol. L, pp. 54–57), Edward Orton described a geological section which was exposed along Twin Creek, a mile east of Germantown. Here were found precipitous walls of clay and gravel from 50 to 100 feet in thickness and extending 0.25 mile in each direction from a point. Beneath this was a bed of peat along 40 rods of the east bank of the creek, varying from 12 to 20 feet in thickness. In the peat-bed were found mosses, grasses, sedges, and wood and berries of red cedar. Orton reported that in 1870 there were taken from this bed two mastodon tusks each 8 feet in length; also a tooth which afterwards was shown to belong to _Castoroides_. Whether or not these tusks were those mentioned by Klippart is uncertain. This section is discussed by Leverett (Monogr. U. S. Geol. Surv., XLI, p. 363, plate XIV) and by G. F. Wright (“Ice age in North America,” 5th ed., p. 592, fig. 151). The latter regards the peat-bed as having come into existence during a temporary recession of the Wisconsin ice and as having been covered up during another advance of it. Leverett thinks that there is good reason to believe that the peat-bed indicates a considerable interval of deglaciation, but that it remains to be determined whether this preceded the formation of the early Wisconsin moraine or succeeded it. Considering the great thickness of the overlying Wisconsin drift and the almost certainty that Illinoian drift underlies the Wisconsin, it seems probable that this peat-bed belongs to an interglacial deposit, probably the Sangamon.