Rhmoceroides Alleghafiiensis. 11 



ing a semi-traiislucency to the teeth, which is wanting to the 

 more opaque jaw. These circumstances are somewhat imitated 

 in the cast. 



" It was found ahout three feet from the surface, lying imme- 

 diately beneath the roots of an oak tree, 24 inches in diameter, 

 , which had been blown down, and was entirely rotten. The soil 

 from which it was dug, w^as the common superficial soil, or dilu- 

 vium of the country, as it is represented to me. I hope to visit 

 the place this summer, and shall then have an opportunity of as- 

 certaining whether the soil is alluvial or diluvial. Being found 

 on the Castleman river, it may probably be the first — for I am 

 not yet in possession of authentic evidence, that any organic re- 

 mains of terrestrial quadrupeds, have been found in this country, 

 in that deposit we are accustomed to call diluvium. The locality 

 is in Somerset county, Pennsylvania, on Castleman's river, about 

 13 miles above the village of Turkey-foot. The superficial soil 

 reposes on the mill-stone grit and shale, which is there superin- 

 cumbent on the carboniferous lime-stone. There is much bitu- 

 minous coal in that region. 



"Dr. Harlan, of this city, an experienced comparative anato- 

 mist, was kind enough to take the comparative dimensions be- 

 tween this fossil, and the corresponding jaw of a rhinoceros indi- ^ 

 cus ; a skeleton of which animal, lately imported from India, has 

 been admirably set up by him, in the hall of the Academy of 

 Natural Sciences, in this city. Those dimensions, which I now 

 add, have been since verified by myself. 



DESCRIPTION OF A FOSSIL FRAGMENT OF A JAW, WITH TWO INCISORS. 



Comparative dimensions between it and the corresponding- Jaw of the 

 Rhinoceros Indicus, of Cuvier. 



RHINOCEROS INDICUS, CDVIER. 



Length of the right intermaxillary bone, infe- \ 



rior border, on a level with the alveolar > 



process, ) 



Length of the superior border, .... 

 Greatest height of intermaxillary bone, . . 



Greatest thickness, 



Distance from the intermaxillary suture, to ) 



the place of the first molar, .... ) 



FOSSIL FRAGMENT. 



Inch. lOths. Inch. lOtlis. 



3 0 2 6 



4 3 1 

 2 2 

 13 13 



2 5 5 



