20. _Utica, Macomb County._—In 1864, Alexander Winchell (Amer. Jour. Sci., vol. XXXVIII, p. 224) reported mastodon remains from near this town. A mention of this discovery is given in volume XVII, page 425, of the “Collections and Researches made by the Michigan Pioneer and Historical Society,” by George H. Cannon. It is here stated that remains had been unearthed on the farm of Hon. P. K. Leech, and that specimens of the jawbone and several teeth were in the cabinet of Hon. W. W. Andrus. A letter to the present writer from Mr. A. F. Leech, son of Mr. P. K. Leech, states that the remains had been found on the east half of the northeast quarter of section 31, township 3 north, range 12 east, in a swale which runs across the land described. These teeth and bones were destroyed in a fire many years ago. According to Leverett and Taylor’s Glacial Map of the Southern Peninsula of Michigan, the locality where these remains were discovered is near the outer border of the glacial Lake Maumee, at a point where there was a delta. This delta is mentioned by Leverett and Taylor (Monogr. LIII, U. S. Geol. Surv., p. 383). It is where Clinton River entered old Lake Maumee. It is evident that the animal did not live before the time of this lake; it probably existed long after this time, when the climate had much moderated. 21. _Plymouth, Wayne County._—Alexander Winchell (First Bienn. Rep. State Geologist, 1861, p. 132) stated that a Mr. Shattuck had exhumed nearly an entire set of teeth of a mastodon, with a part of a tusk 7 feet in length. Winchell saw five of the teeth; the other bones appear to have been destroyed. The exact location of this place is not known, but Plymouth is within the border of the glacial Lake Maumee; and the existence of the mastodon was possible only well toward the close of the Wisconsin stage. 22. _Wyandotte, Wayne County._—In the collection of the University of Michigan are many bones, including jaws with teeth, of a mastodon found in Monguegon Township, about 6 miles southwest of Wyandotte and about 2 miles northwest of Sibley. The locality more accurately given is the northwest quarter of the northeast quarter of section 12, township 4 south, range 10 east. This was on the farm of Mr. James H. Vreeland. A county ditch was being made to drain what is known as the Big Marsh. As reported to the writer by Mr. R. A. Smith, Assistant State Geologist of Michigan, on a very coarse limestone gravel are 30 inches of blue clay and over this about 30 inches of muck. The bones were mostly in the blue clay; those lying in the muck were much decayed. Some teeth and an atlas are in the possession of Mr. Vreeland.