DAKOTA AND NEBRASKA. 263 



The lower molar, the second or third of the series, measures antero-posteriorly four- 

 teen and a half lines, transversely eight lines, or, with the investing cementum, 

 eleven and a half lines. 



An inferior molar, found in association with remains of Elephas, Mastodon america- 

 nus, Megatherium mirabile, &c., in the excavation of the Brunsmck Canal, near 

 Darien, Georgia. It is a second or third of the series, and is not distinguishable in 

 size or anatomical character from the corresponding tooth of the ordinary Horse. 



A number of upper and lower molars, and a tibia, found in association with 

 remains of Mastodon americanvs, Elej)lias americanus, Megalonyx Jeffersonii, MyJodon 

 Harlani, Felis atrox, &c., in the vicinity of Natchez, Mississippi. Some of the teeth 

 are of large size, and exhibit a highly complex folding of the enamel on the tritu- 

 rating sui'face ; others are of the ordinary size and anatomical character. 



An axis or second cervical vertebra, a calcaneum, a metacarpal, a metatarsal, three 

 pasterns and a coffin-bone, from the great fossU ossuary of Big-bone-lick, Kentucky. 



Several molar teeth formerly attributed to the latter locality, and referred by the 

 writer to Equus curmdens, and subsequently to the recent Horse. Being found with- 

 out label in a collection of fossils from Big-bone-lick in the Museum of the Academy, 

 they were supposed to be from the same locality, but they are now suspected to be 

 the specimens referred to by Dr. Harlan as being in the possession of the Academy, 

 and derived from the valley of the Ohio or Mississippi. 



A coronary bone, found in association with remains of Bootherium cavifrons and a 

 great abundance of remains oi Mastodon americanus in Benton Co., Missouri. 



The author has further had the opportunity of inspecting numerous specimens of 

 fossil teeth from the post-pliocene deposits in the vicinity of Charleston, South Caro- 

 lina, a first upper molar from Illinois Bluffs, Missouri, a similar tooth from Texas, 

 and likewise the specimens from North Carolina described by Prof Emmons. 



Nearly all the equine remains above indicated have been described and illustrated 

 in the work of Prof Holmes, entitled Post-pliocene Fossils of South Carolina, pub- 

 lished in Charleston in 1860. 



The associates of these equine reAains in the various localities from whence they 

 were obtained are the Mastodon americanus, Elej^has americanus, E. Columhi, Tapirus 

 americanus fossilis, Tapirvs Haysii, Hipparion venustum, Bison latifrons, Bootherium 

 cavifrons, Megatherium mirabile, Megalonyx Jeffersonii, M. dissimilis, Mylodon Harlani, 

 Ereptodon priscus, Felis atrox, Canis dims, Ursus amplidens, Castoroides ohioensis, 

 Hydrochoerus ^sopi, etc. 



The weight of evidence is certainly in favor of most of the equine remains above 



