Fossil Bones of the Megalo7iyx. 169 



versely to the jaw, and three molars, different from any before 

 known, and of which an idea may be best formed by referring 

 to the figure given by Dr. Harlan in the American Journal of 

 Geology. The structure of these teeth is the same in all; 

 consisting of a bony substance, encased in enamel, which 

 merely forms a border round the crown. This jaw-bone is 

 now preserved in the collection of the Lyceum. 



§§. Of the Trunk. 

 But few portions of the trunk have been found : they include 

 seven vertebrae, three entire ribs, with fragments of others, and 

 the chief portion of an os ilium. Part of these were discovered 

 in the White Cave, in Kentucky, and the rest in Big-Bone 

 Cave, in Tennessee. For a knowledge of the latter locahty 

 we are indebted to Dr. G. Troost, who has recently published 

 an account of it in the Transactions of the Geological Society 

 of Pennsylvania. The remains from White Cave are described 

 and figured by Dr. Harlan, in the Journal of the Academy of 

 Natural Sciences.* 



<^ § §. Anterior Extremity. 



This is better known than any other part of the skeleton. — 

 The scapula is among those found in the White Cave, and the 

 clavicle at Big-Bone Lick. A humerus, young and imperfect, 

 accompanied the scapula; but one more complete has been 

 dug up at Big-Bone Lick. The bones of the fore-arm were 

 amongst those originally discovered in Virginia, and a young 

 radius was found in White Cave.t 



* At a recent meeting of the Lyceum, Dr. Harlan informed the 

 Society, that the bones which he had described as from White Cave, he 

 had since ascertained to have been found in Big-Bone Cave, Tennessee. 

 This would reduce the known localities to three, unless we include the 

 Mummy Cave, mentioned by Mr. Rafinesque. 



f Or, according to Mr. Rafinesque, in the Mummy Cave near it. Atl. 

 Jour. vol. I. p. 28. 



