259 



the same stage of wear, as to render it probable tliat it may Ijelong to. the 

 same species. 



The tooth is much worn, leaving two narrow crcscentic enamel pits in the 

 middle of the triturating suriace. No trace of an internal column or tubercle 

 e.xists in the interval internally of the inner lobes of the crown. 



The specimen measures 11 lines antero-posteriorly, and nearly the same 

 extent transversely. 



Fig. 22 represents an astragalus found in association with the molar tooth 

 just described, and probably belonging to the same animal. It has nearly 

 tlie size and form of those of the common deer, but is proportionately a little 

 longer and narrower. 



Another specimen in the same collection consists of a cubo-navicular bone 

 of a ruminant a fourth smaller than the common deer. It was found in asso- 

 ciation with the equine tooth above described, and represented in Fig. 16, 

 Plate XX. 



An additional specimen consists of a last lumbar vertelri'a, a])parently of a 

 ruminant. It was obtained in Washington County, at a de[)th of 30 feet, 

 from a hard arenaceous limestone. It is white in color, crushed downward, 

 and has a portion of the matrix adherent. The vertebra has nearly the size 

 and form of the corresponding bone of the camel, and tnay have pertained to 

 the largest species of Procamelus, named P. rohustus. 



Procamelus virginiensis. 



I may here indicate the recent discovery of some remains, apparently of a 

 species of Procamelus, in the Miocenj3 Tertiary formation of Virginia, the 

 first which have yet been noticed of the family in any locality east of the 

 Mississippi River. 



Mr. C. M. Smith, of Richmond, Virginia, while engaged in excavating a 

 tunnel beneath the city, discovered a number of bones and teeth, which he 

 has loaned to me for investigation. They were found imbedded in blue clay 

 containing numerous infusorial remains, among which the beautiful frustules 

 of a Coscinodiscus are especially conspicuous. The fossil-bones mainly 

 consist of those of cetaceans and fishes, but among them are a few of 

 land-animals, and also a portion of a humerus of a Inrd. The forma- 

 tion from which the fossils were derived is proliably an estuary deposit of 

 Miocene age. Among the fossils there are several tcetli, which arc sup- 



