200 Oti the Sivatherium giganteum. 



Enp. Tnchcs. Metres. 



Width between the bodies of the malar bones 16"62 -422 



Do. base of the skull behind the mastoid processes (muti- 

 lated on both sides) 19"5 '496 



Do. between the cheek tuberosities of the maxillaries ... 12'2 "3095 

 Do. of muzzle portion of the maxillaries in front of the 



first molar 6-8 '149 



Do. of do. where truncated (partly restored) 4-1 '104 



Do. between the outer surfaces of the horns at their base 12'5 "312 



Do. do. do. fractured tips of ditto 1365 -347 



Perpendicular from a chord across tips of do. to the brow 4-2 '165 

 Depth from the convexity of the occipital condyles to 



middle of frontal behind the horns 11'9 '302 



Do. from the body of the sphenoidal to do. between the 



horns 994 -252 



Do. from middle of the palate between the third and 



fourth molars do. at root of the nasals 7*52 '192 



Do. from posterior surface last molar to extremity of 



the nasals 13'0 '331 



Do. from grinding surface penultimate molar to root of 



the nasals 103 -262 



Do. from the convexity near the tip of the nasals to the 



palatial surface in front of the first molar 5'53 "14 



Do. from middle of the alae of the occipital to the swell 



at vertex of frontal 8-98 -228 



Do. from inferior margin of the orbit to grinding surface 



fifth mobr 73 -186 



Do. from the grinding surface first molar to edge of the 



palate in front of it 26 '066 



Space from the anterior angle of orbit to tip of the nasals 10'2 '2595 



Antero-posterior diameter left orbit 3*3 "084 



Vertical do. do 27 '0685 



Antero-posterior diameter of the foramen magnum 2'3 '058 



Transverse do. do 2'6 "066 



Long diameter of each condyle 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 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 wih. the 

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

 oiFat 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 j 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 striae, as in the upper molars of the head. It had been com- 

 posed of three semicylinders, 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. 

 The form and relative proportions of the jaw agree very closely witii 



