Reference is made by Worthen later (Geol. Surv. Illinois, vol. VIII, p. 8) to the discoveries of vertebrate fossils in the drift and loess of this region. He mentions that Hon. William McAdams found, at Alton and Chester, remains of mastodon, mammoth, megalonyx, castoroides, and “_Bos primigenius_.” McAdams’s collection is now in the U. S. National Museum and a list of the species is presented on page 339. These species were described by the writer in 1920 (Proc. U. S. Nat. Mus., vol. LVIII, pp. 109–117). In it are only two fragments of molars of this species. In the collection at Yale University (No. 11713) is an upper left last molar of a mastodon, obtained from Mr. McAdams. The enamel is very white. There is on the label the date “Feb. 21, 1888.” This may be one of the teeth referred to above, and the date may refer to the date of purchase. 6. _Sandoval, Marion County._—Before the American Association for the Advancement of Science, at its meeting in 1856 (Proc. Amer. Assoc. Adv. Sci., vol. X, 1857, p. 163), the geologist J. W. Foster stated that at Sandoval, on the Illinois Central Railroad, mastodon remains had been found at a depth of 12 feet, under conditions similar to those existing near Beaucoup, in Washington County. Here again there is a poverty of information. In this county there is, in many places, a very compact white clay overlying the Illinoian drift. The relations of this to the drift are not well understood. At a depth of 12 feet in this clay the Illinoian drift might not be reached in some places, while at this depth in the drift a pre-Illinoian deposit might be encountered. 7. _Near Niantic, Macon County._—In 1873 (Geol. Surv. Illinois, vol. V, p. 308), A. H. Worthen gave an account of finding some remains of a mastodon in this county, near the line between it and Sangamon County and between Illiopolis and Niantic, on a farm then owned by Mr. William F. Correll. The American Journal of Science, volume 50, page 422, in a note regarding the discovery, states that the place is 1.5 miles southeast of Illiopolis. A well was being sunk in a low, spongy piece of ground, which had evidently been a pond filled up by wash from the surrounding higher ground. At a depth of 4 feet two tusks were found, one measuring 7 feet in length and about 8 inches in circumference, the lower jaw containing the teeth, the teeth of the upper jaw, and some small bones. Besides these remains of the mastodon, there were found some bones of the buffalo and deer, and two antlers of an elk. The bones of these yet existing species are said to have been found at the same depth as the mastodon bones, but were of a lighter color and less decayed. The bones were partly embedded in a light-gray quicksand, filled with small fresh-water shells. Above this was 4 feet of black peaty soil.