Gidley (Bull. 26, Geol. Surv. Georgia, p. 436) recognized Gomphotherium floridanum and Mammut americanum in a collection which had been made some years ago at Brunswick, probably in dredging in the harbor. Inasmuch as only fragments of these teeth were present, the identification was difficult. The writer has, through the kindness of Professor S. W. McCallie, had the opportunity to examine these fragments. They appear all to belong to Gomphotherium rugosidens, a species rather common in that region. This species probably does not belong to the Pleistocene, but to the upper Miocene or the Lower Pliocene. It is possible, however, that it belongs to the lowermost Pleistocene, the Nebraskan.
2. Skidaway Island, near Savannah, Chatham County.—Remains of Mammut americanum have been found at two places in Chatham County, Heyner’s Bridge and Skidaway Island. Lyell (Travels in N. A., 1845, vol. I, p. 163) records his visit to Heyner’s Bridge, on White Bluff Creek, about 7 miles south of Savannah. In Hodgson’s memoir this locality is said to be on Vernon Creek (map [40]). Lyell had learned from Dr. Habersham that bones of mastodons and other extinct mammals had already been found there. Lyell himself secured a grinder of a mastodon. It was found in a bed of clay about 6 feet thick exposed only at low water. The tooth referred to may be the one mentioned by Lydekker (Cat. Foss. Mamm. Brit. Mus., pt. IV, p. 23). Hodgson (“Memoir on Megatherium,” p. 12) reported the discovery of mastodon remains at this place, specifying a section of a tusk 3.25 feet long and nearly 11 inches in circumference; also a femur, which was sent to Paris. Reference is made to the mastodon remains on page 42 of the memoir mentioned. For the geology of this locality and a list of the species found there the reader is referred to page 371.
FLORIDA.
It has not been practicable to arrange the figures on the map of mastodons in Florida in an orderly manner. Below, the localities are described by beginning at the northern end of the State and ending at the southern end.
1. Marianna, Jackson County.—In the U. S. National Museum (No. 324) is a tooth of Mammut americanum, recorded as having been sent to the National Institute, September 25, 1847, by Walter Yonge, from Marianna. No additional information has been preserved. It is a large upper right last molar, with 5 cross-crests, a hinder talon, and nearly complete roots. Marianna is situated on Chipola River.
12. Little River, Gadsden County.—Dr. E. H. Sellards (8th Ann. Rep. Florida Geol. Surv., 1916, p. 104) reported that a tooth of Mammut americanum had been obtained from Little River.
2. Fort White, Columbia County.—Dr. E. H. Sellards reported to the writer the discovery of a tooth of Mammut americanum at a point 3 miles northwest of Fort White. No details have been received. The town is on Santa Fe River.
3. Citra, Marion County.—In Ward’s Natural History Establishment, at Rochester, New York, the writer saw in January 1914, 2 cross-crests of a probably hindermost upper molar of Mammut americanum. There had been present a large pulp-cavity. Nothing definite about the history of the specimen could be obtained, except that it had been found at Citra.
15. Neals, Alachua County.—From this locality Sellards (5th Ann. Rep. Florida Geol. Surv., p. 58) reported the discovery of a mastodon, probably Gomphotherium floridanum. Associated with this species was an undetermined species of Hipparion. At the same place has been found Tapirus terrestris? On his plates IV and V of the same volume, Sellards has figured teeth belonging to two undetermined species of mastodons. All of these fossils came from the phosphate deposits at Neals.