11. _Tarboro, Edgecombe County._—In the U. S. National Museum (No. 205) is a lower right last molar of _Mammut americanum_, recorded as having been sent by Dr. Pitman, of Tarboro. It is black and very heavy. 12. _Rocky Mount, Nash County._—Professor E. Emmons (Geol. Surv. North Carolina, 1852, p. 56) mentioned the finding of mastodon bones in marl-pits, on the farm of Mr. Knight, on the bank of Tar River, 3 miles west of Rocky Mount. The Pleistocene is here supposed to belong principally to the Sunderland, but partly to the Wicomico formation. Emmons, in 1858 (Rep. North Carolina Geol. Surv., Agric. East Cos., p. 199), figured and briefly described a molar of a mastodon which he referred to _Mastodon giganteus_. This was found in a Miocene marl pit in Halifax County; but so many Pleistocene species have been reported from such marls that it is possible that the tooth belonged to a Pleistocene animal. Leidy (Jour. Acad. Nat. Sci. Phila., vol. VII, 1869, p. 396) referred this tooth with doubt to his _Mastodon obscurus_; but the type of the latter, a lower molar (Leidy op. cit., plate XXVII, fig. 13), presents no such double series of trefoils. Leidy (op. cit., p. 247, plate XVII, fig. 16) referred some fragments of mastodon teeth found at Tarboro to his _Mastodon obscurus_; but these seem to the writer to belong to _Gomphotherium rugosidens_. We do not know that _G. obscurum_ is a Pleistocene species, nor is it certain that it has been found in North Carolina. SOUTH CAROLINA. (Map 5.) 1. _Beaufort, Beaufort County._—In the region about Beaufort numerous remains of mastodons have been found, most of which are to be referred to _Mammut americanum_. In the Academy of Natural Sciences of Philadelphia the writer has seen a fine left lower last molar of this species. The collection of Rutgers College contains a part of a tooth from Coosaw River. At Princeton University there is an upper second true molar from somewhere about Beaufort. Field Natural History Museum has 3 teeth of _Mammut_, recorded as having been found in the phosphate bed at Beaufort. Leidy (Proc. Acad. Nat. Sci. Phila., 1870, p. 98) stated he had seen, in the collection of C. N. Shepard at Amherst College, bones, fragments of jaws, and teeth of mastodon from the marl at the head of Hilton Harbor, on St. Helena Island, on which Beaufort is situated. Among these were 2 inferior tusks about 10 inches long and 2 inches in diameter at the base. If the molars which accompanied them had differed from those of _Mammut americanum_, Leidy would have been quick to note the fact. Evidently the bones and teeth mentioned by Leidy are those now in the mounted skeleton at Amherst College, described by Professor F. B. Loomis (Amer. Jour. Sci., ser. 3, vol. XLV, p. 437, figs. 1, 3, 4) as _Mastodon americanus_. This was a very large animal and the two large lower tusks show that it belonged to _Mammut progenium_.