3. _Memphis, Shelby County._—In 1850 (Proc. Bost. Soc. Nat. Hist., vol. III, p. 280; Amer. Jour. Sci., ser. 2, vol. X, p. 58), Jeffries Wyman reported that a tooth and a claw of _Megalonyx jeffersonii_ had been found in the “diluvium” of Mississippi River at Memphis. The tooth is a first upper molar of large size; the claw is that of the median digit. With these were found remains of mastodon, beaver, and _Castoroides ohioensis_. 4. _Nashville, Davidson County._—From Mr. William Edward Myer, Nashville, Tennessee, the writer has received for examination a fragment of a tooth of a mylodon which was found near Nashville, in sand or gravel, along Cumberland River, beneath 30 feet of gravel. This tooth appears to be the left lower penultimate molar of _Mylodon harlani_, but it is in some ways different. The antero-inner face has a broad, shallow groove, while the outer face makes a smaller angle with the inner hinder face than in the tooth figured by Leidy. The transverse section resembles that of the lower penultimate molar of _M. sulcidens_ Cope (Proc. Amer. Philos. Soc., vol. XXXIV, plate X, fig. 4_a_), and somewhat the tooth regarded by Cope as the upper fourth molar of _M. sulcidens_ (op. cit., plate XI, fig. 7). It is probable that _M. sulcidens_ and _M. renidens_ of Cope are synonyms of _M. harlani_, as Stock (Bull. Geol. Soc. Amer., vol. VIII, p. 331) is inclined to believe. The greatest length of a cross-section of the tooth found at Nashville is 27 mm.; the greatest width 14 mm. The tooth is the property of Mr. H. L. Ridge, of Nashville. At the same locality have been found remains of _Equus leidyi_, _E. complicatus_, _Mammut americanum_, a camel (_Camelops?_), a species of deer, and some turtle bones. The deposit seems to belong to a stage not far removed from the Aftonian. KENTUCKY. (Map 3.)