Mylodon harlani? is known from a single claw, but from which stratum it was derived is not known.
Chlamytherium is represented by a part of the right side of the lower jaw, a part of the left side, a foot-bone, and numerous dermal plates (Sellards, op. cit., p. 148, plate XXVIII, figs. 4 to 6; plate XXX, fig. 7). Most of these remains have been taken from stratum No. 2, but some finely preserved dermal plates have been collected from No. 3.
Dasypus remains, consisting of dermal scutes, have been found in both No. 2 and No. 3.
In the collection of the Florida Geological Survey (No. 1795) is a bone, apparently the right parietal of an undetermined xenarthrid. It was found in the canal of the Indian River Farms Company, east of the railway and near Indian River. The length of the bone at the midline is 70 mm. and here the thickness is 22 mm. There appears to have been no median crest and only a feebly indicated occipital crest. There is no rough surface for the temporal muscles, as in Nothrotherium, and the bone is thicker than in that genus.
For complete lists of the fossil vertebrates found at Vero, see page [382].
9. Arcadia, De Soto County.—The Xenarthra are represented in the Pleistocene deposits about Arcadia by the genera Megalonyx, Glyptodon, and Chlamytherium. If these were not found at Arcadia they were collected along Peace Creek, not far from the town. A list of the species found in the vicinity of Arcadia is given on page [380].
Leidy (Trans. Wagner Free Inst., vol. II, p. 27) stated that a first phalanx of Megalonyx jeffersonii was among the fossils collected along Peace Creek. It was probably found on the sand-bar at Arcadia. Among the fossil vertebrates described by Leidy, the paper just cited included some dermal plates which he referred to the genus Glyptodon. Two of these plates were figured (op. cit., plate IV, fig. 9; plate VI, fig. 1) as those of G. petaliferus, a species based on half of a dermal scute described by Cope from southwestern Texas. The dermal scute shown on Leidy’s plate IV appears to be indistinguishable from similar plates which have been referred by the present writer to Cope’s G. petaliferus (Proc. U. S. Nat. Mus., vol. LI, 1916, p. 107, plates III to V). The scute represented by Leidy on his plate VI appears to be far less extensively pitted than any of those of the specimen just referred to. On Leidy’s plate V are two views of a scute which he thought might have belonged on the tail of a glyptodon. It will be observed that this scute has a beak distinctly set off from the body of the scute. Among the few caudal scutes of the specimen which the writer described none presents such a beak, but such may have existed. It seems probable, however, that there was a single species of Glyptodon found on Peace Creek and that it was different from G. petaliferus. Leidy thought that these caudal scutes resembled those on the tail of the South American G. asper; but Burmeister’s figures do not indicate exactly such keeled scutes. It is most probable that the Florida species requires a new name. It is to be called Glyptodon rivipacis Hay.
Leidy referred another dermal scute to some glyptodont animal (op. cit., plate VI, figs. 2, 3), but its nature is doubtful; it may even belong to one of the large species of Testudo. A conical bone (plate III, figs. 10, 11) belonged pretty certainly to Testudo.
In the paper cited Leidy described and figured (p. 24, plate III, figs. 3 to 6) plates of an armadillo-like animal to which he gave the name Glyptodon septentrionalis. It is now known as Chlamytherium septentrionale. Leidy had over 30 of these dermal scutes which had been found at Arcadia. They are now in the Wagner Free Institute at Philadelphia.
Sellards (Amer. Jour. Sci., vol. XL, 1915, p. 143) states that there are 3 dermal plates of this animal in the U. S. National Museum. In 1915 (Florida Geol. Surv., vol. VII, pp. 77, 78, plate on p. 114) he described a lower jaw, a tooth, and 2 dermal plates of the same animal.