A NEW FOSSIL RUMINANT GENUS. 



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Eng. Inches. Metres. 



Depth from middle of the ala of the occipital to the swell at vertex of frontal, . . 8,98 .228 



Do. from inferior margin of the orbit to grinding surface 5th molar, 7.3 .186 



Do. from the grinding surface 1st molar to edge of the palate in front of it, .... 2.6 .066 



Space from the anterior angle of orbit to tip of the nasals, e . . . 10.2 .2595 



Antero-posterior diameter left orbit, « 3.3 .084 



Vertical do, do 2.7 .0685 



Antero-posterior diameter of the foramen magnum, 2.3 .058 



Transverse do. do., • - 2.6 .066 



Long diameter of each condyle, J 4.4 .112 



Short or transverse do. of do. , » 2.4 .0603 



Interval between the external angles of do. measured across the foramen, 7.4 .188 



Among a quantity of bones collected in the neighbourhood of the spot 

 in which the skull was found, there is a fragment of the lower jaw of a 

 very large ruminant which we have no doubt belonged to the Sivatherium : 

 and it is even not improbable that it came from the same individual with 

 the head described. It consists of the hind portion of the right jaw broken 

 off at the anterior third of the last molar. The coronoid apophysis, the 

 condyle, with the corresponding part of the ramus, and a portion of the 

 angle are also removed. The two posterior thirds only, of the last molar, 

 remain ; the grinding surface partly mutilated, but sufficiently distinct to 

 show the crescentic plates of enamel, and prove that the tooth belonged to 

 a ruminant. The outline of the jaw in vertical section, is a compressed 

 ellipse, and the outer surface more convex than the inner. The bone 

 thins off, on the inner side towards the angle of the jaw, into a large and 

 well marked muscular hollow : and running up from the latter, upon the 

 ramus towards the foramen of the artery there is a well defined furrow, as 

 in the Ruminantia. The surface of the tooth is covered with very small 

 rugosities, and strife, as in the upper molars of the head. It had been 

 composed of three semi-cylinders, as is normal in the family, and the 

 advanced state of its wearing proves the animal from which it proceeded 

 to have been more than adult. 



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