This specimen was found near the southern edge of Lisbon, on Middle Fork of Little Beaver Creek, in the northwest quarter of the northeast quarter of section 24, township 18 north, range 3 west. The locality is apparently outside of the glaciated area; and it is at present impossible to determine the geological age of the animal beyond that it undoubtedly belongs to the Pleistocene. The writer believes that Mylohyus nasutus did not survive the Wisconsin ice-stage. The specimen was described and figured by the writer in 1914 (Iowa Geol. Surv., vol. XXIII, p. 226, plate XXV, figs. 4–6).
MICHIGAN.
(Map [36].)
1. Belding, Ionia County.—So far as the writer knows, no species of peccary has been found in the State of Michigan, except at Belding. The remains are in the palæontological collection of the University of Michigan, at Ann Arbor, and belong to the species Platygonus compressus Le Conte. The remains are said to consist of bones of 5 individuals; and Mr. N. A. Wood, preparator at the university, informed the writer there are 294 bones. The skull of one of the 5 individuals was missing when the collection was made. The skeletons were found in a peat-swamp, in 1877, and were sent to Professor Alexander Winchell by Mr. A. Tuttle. A skull belonging to this collection was described in 1903 (Jour. Geology, vol. XI, p. 777, figs. 1–4) by Mr. George Wagner.
It seems probable that there, as in two or three other known cases, a herd of these animals, asleep together, had succumbed to rigorous weather, probably to a winter blizzard.
Belding is situated on Flat River, a tributary of Grand River. It lies close to a part of the Charlotte moraine system, thought to be correlated with the Valparaiso system. These peccaries could not have lived in that region until after the Wisconsin ice had retired into Lake Michigan, or nearly so. It is more probable that they lived there long after this retirement, at a time when the climate had become much warmer.
INDIANA.
(Map [36].)
1. Gibson County.—The type specimen of Mylohyus nasutus was found somewhere in this county. The specimen was first mentioned by Leidy in 1860 (Proc. Acad. Nat. Sci. Phila., p. 416), but without other designation than peccary. Leidy wrote that it had been sent to him by Dr. David D. Owen, who informed him that it had been discovered in Gibson County, in digging a well, at a depth of between 30 and 40 feet. No more exact locality has ever been determined. The specimen consisted of the front of the skull only. It was later described by Leidy (Proc. same Academy, 1868, p. 230), under the name Dicotyles nasutus; and in 1869 (Jour. Acad. Nat. Sci. Phila., vol. VII, p. 385, plate XXVIII, figs. 1, 2) was further described and illustrated. The figures referred to have been reproduced by the present writer in 1912 (Geol. Surv. Indiana, vol. XXXIII, p. 607, text-figs. 42, 43), and again in 1914 (Iowa Geol. Surv., vol. XXIII, plate XXVI, figs. 1, 2).
It is unfortunate that Owen and Leidy did not more accurately establish the locality where this jaw was found. In Gibson County there is a considerable variety of geological deposits, even considering only those belonging to the Pleistocene and Recent. The eastern and the southeastern portion lies outside the drift-covered region. A strip along the Wabash is occupied by alluvial deposits belonging to the Recent epoch. Outside of this is another strip covered mostly by Illinoian drift.