203 



Genus Palceotherium*. 



829. A considerable proportion of the right ramus of the lower jaw of the 

 Palceotherium magnum, Cuvier, imbedded in a block of gypsum, with the 

 outer surface exposed to view. Four of the molar teeth are present, tbe 

 first in place is the second in the natural series ; the next is the last molar, 

 and has been artificially cemented in its present situation ; the two others 

 are in their proper sockets and are the fifth and sixth of the series. The 

 first small molar and the canine are imbedded in one corner of the block ; 

 and a portion of another molar is visible anterior to the coronoid process. 

 The crown of each of the molars is defended by a basal ridge : that of 

 the last molar is three-lobed, the rest, with the exception of the first small 

 one, are bilobed. The broad produced and rounded angle of the jaw is 

 .well shown in the present specimen, which most resembles the one figured 

 by Cuvier in the ' Ossemens Fossiles,' 1822, torn. iii. pi. 48. fig. 1. 



Locality unrecorded, but most probably from Montinartre. 



Hunterian. 



The following illustrations of the genus Palaeotherium are plaster-casts of 

 specimens from the gypsum of Montmartre, described and figured by Cuvier 

 in the third volume of the ' Ossemens Fossiles,' 4to edition, 1822. 



830. A great proportion of the cranium of the PalcEotherium crassum, Cuvier. 



The temporal fossae which meet above and are separated by a sharp hori- 

 zontal ridge, occupy one-half of the total length of the skull : the upper 

 surface of the skull anterior to the sagittal ridge is smooth and convex 

 transversely. The occipital crest is square above ; as in the Hog, it pro- 

 jects a little further back than the occipital condyles. The nasal bones 

 are prolonged and terminate in a point anteriorly as in the Horse, and 

 are not curtailed and elevated as in the Tapir : their base is very broad 

 where they join the frontal bones. The intermaxillary bones are in ad- 

 vance of the nasals : the notch which divides the nasal from the maxillary 

 bones extends back as far as the fourth molar. The orbit is small and 



* vaXmui ancient, Qr^pinv beast. 



2 d 2 



