MEGATHERIUM. 55 



tuberosities is eight inches ; and the head of the bone is six inches in its long dia- 

 meter, and five and a half in its short diameter. 



The lunar bone is four and a half inches broad between the dorsal and palmar 

 surfaces ; and its radial articular surface is three inches wide, and five and a half 

 in the curve antero-posteriorly. 



The fragments of two teeth of Megatherium, loaned to me by Major Leconte, are 

 from Skiddaway Island. One of them (PI. XV, Fig. 4) is part of a third or fourth 

 inferior molar, and measures eighteen lines antero-posteriorly and nineteen lines 

 transversely. The other specimen is a longitudinal, anterior, or posterior fragment 

 of the largest molar tooth of the Mccjatherium I have yet seen. It measures nearly 

 two inches in transverse diameter, and may probably belong to the upper jaw. 



The fragments of teeth of the Megatherium loaned to me by Professor Holmes, 

 of Charleston, are two very small ones, from the shores of Ashley river, South 

 Carolina, where they were discovered by Capt. Bowman, U. S. A., in association 

 with remains of Elephas, Mastodon, Equus, Tapirus, Dicotijles, Hipparion, Ilydro- 

 clioerus, etc., and are of no further interest than that they indicate a new locality 

 for the Megatherium. 



At the moment of reading the last proof sheet of this memoir, the Academy of 

 Natural Sciences has received a donation from Dr. Robert W. Gibbes, of Columbia, 

 South Carolina, consisting of some remains of the Megatherium mirabile, from 

 Skiddaway Island, Georgia, as follows : two bodies and an arch of three vertebra; ; 

 four fragments of ribs; a small fragment of a lower jaw, and the proximal ex- 

 tremity of a humerus. 



