Dr. John M. Clarke (56th Ann. Rep. New York State Museum, published in 1904, p. 926) states that the tusks of this mastodon are now in the American Museum of Natural History and form a part of a mounted mastodon. The lower jaw is also in that museum. The writer has seen this jaw, No. 14345, and there are in it 2 tusks of considerable size, such as the writer has supposed characterized _Mammut progenium_. In case this species shall prove to be a natural one it continued from the first interglacial or even earlier to the close of the Wisconsin. This is the mastodon to which Blatchley refers (22d Rep. Indiana Geol. Surv., p. 90). _East Lynn, Vermillion County._—The writer has a note to the effect that some mastodon remains were found near this place in 1881, but the authority can not be cited. East Lynn is 7 miles west of Hoopeston. _Rossville._—Dr. Rufus M. Bagg, jr. (Univ. Ill. Bulletin, vol. VI, No. 17, 1909, p. 49, plate IV, figs. 2, 3) reported the finding of a mastodon’s tooth near Rossville, on the banks of the North fork of Vermillion River, about 7 miles south of Hoopeston. The figures indicate that the tooth is the lower right first molar, 127 mm. long and 85 mm. wide. All three of the mastodons mentioned were evidently buried in pond and swamp deposits which lie on or near the Bloomington moraine of the Wisconsin drift. They lived, therefore, after the disappearance of the last glacial ice-sheet and probably long after that disappearance. 20. _Beecher, Will County._—At Hebron, Indiana, the writer has seen various bones of mastodons which had been unearthed in the region about Beecher by Mr. Jacob Davis, in dredging large ditches. He described these bones as amounting to “about two wagonloads.” Mr. George Langford, of Joliet, Illinois, stated in a letter that it is reported that over a dozen mastodons have been found on one farm near Beecher in the last 10 years. Mr. Langford sent also a geological section (fig. 1) taken along Trim Creek. Besides the mastodon remains found there, he obtained a large part of an antler of _Cervalces_. The locality is given as the northwest quarter of the southwest quarter of section 11, township 33 north, range 14 east, 3 miles north of east of Beecher. This locality is on the Valparaiso moraine, the last formed before the Wisconsin ice withdrew into Lake Michigan. It was, however, probably long after this that the mastodons lived and died there. Mr. Langford’s account seems to indicate that, after the deposition of the Valparaiso moraine and the withdrawal of the ice-sheet, there was left along what is now Trim Creek a shallow lake, which became gradually filled by washings from the moraine. This at length became a marsh and produced peat and other vegetable muck. At one stage the surface appears to have been occupied by a forest, which later became covered by about 4 feet of sandy soil. Over this is 2 feet of black peat, itself overlain by probably Recent deposits. [Illustration: