21. _Morris, Grundy County._—In 1870, Frank H. Bradley (Geol. Surv. Illinois, vol. IV, p. 193) stated that in 1868 the remains of a mastodon were found at Turner’s “strippings,” about 3 miles east of Morris. These bones lay under 18 inches of black mucky soil and about 4 feet of yellowish loam, and rested on about a foot of hard blue clay, which itself covered the coal. The bones were mostly badly decayed and the greater part were broken and thrown away by the miners; but some, including a part of a lower jaw and 3 teeth, were sent to the State Cabinet at Springfield. The locality was regarded by Bradley as part of an old river bottom.
In 1871, Worthen referred to the same or another mastodon which had been found in the vicinity of Morris. He stated that it had been found in undisturbed drift, 8 feet below the surface. The blue clay on which lay the mastodon described by Bradley may have been brought down from the ice which deposited the Valparaiso moraine. The loam and muck were probably deposits of considerably later date. It is not probable that the Worthen mastodon was buried in undisturbed drift.
22. _Whitewillow, Kendall County._—At a locality in this county, near Whitewillow, have been found many mastodon bones and those of various other animals. The place is 5 miles west by north of Minooka and 15 miles west of Joliet. Collections have been made there by Dr. E. S. Riggs, of the Field Museum of Natural History, Chicago, and by Mr. George Langford, of Joliet. Mr. Langford wrote that his collection was made in township 35 north, range 8 east, and probably section 27. The farm belonged to John Bamford. Apparently Dr. Riggs’s collection was made at the same place. Further details will be found on page 337.
Dr. Riggs reported in Netta C. Anderson’s list, already referred to several times, that in 1902 at least six skulls and numerous other bones had been found in a well 10 feet in diameter. Above these were bones of bison, deer, and elk.
23. _Yorkville, Kendall County._—In the Field Museum of Natural History is a composite skull of a mastodon, part of which was found somewhere about Yorkville; but the writer knows nothing more definite.
Yorkville is situated on Fox River, near the northwestern border of the Marseilles moraine.