1836.] a new Fossil Genus of the Sivalik range. 221 



on both sides of the jaw are present and singularly perfect. The only 

 mutilation is at the vertex of the cranium, where the plane of the occi- 

 pital meets that of the brow : and at the muzzle, which is truncated a 

 little way in front of the first molar. The only parts which are still 

 concealed, are a portion of the occipital, the zygomatic fossae on both 

 sides, and the base of the cranium over the sphosnoid bone. 



The form of the head is so singular and grotesque, that the first 

 glance at it strikes one with surprise. The prominent features are — 1st, 

 the great size, approaching that of the elephant : 2d, the immense deve- 

 lopement and width of the cranium behind the orbits : 3d, the two diver- 

 gent osseous cores for horns starting out from the brow between the or- 

 bits: 4th, the form and direction of the nasal bones, rising with great 

 prominence out of the chaffron, and overhanging the external nostrils in 

 a pointed arch : 5th, the great massiveness, width and shortness of the 

 face forward from the orbits : 6th, the great angle at which the grinds 

 ing plane of the molars deviates upwards from that of the base of the 

 skull. 



Viewed in lateral profile, the form and direction of the horns, and the 

 rise and sweep in the bones of the nose, give a character to the head 

 widely differing from that of any other animal. The nose looks some- 

 thing like that of the rhinoceros; but the resemblance is deceptive, 

 and only owing to the muzzle being truncated. Seen from in front, 

 the head is somewhat w T edge-shaped, the greatest width being at the 

 vertex and thence gradually compressed towards the muzzle: with 

 contraction only at two points behind the orbits and under the molars. 

 The zygomatic arches are almost concealed, and nowise prominent : 

 the brow is broad, and flat, and swelling laterally in two convexities ; 

 the orbits are wide apart, and have the appearance of being thrown 

 far forward, from the great production of the frontal upwards. There 

 are no crest or ridges : the surface of the cranium is smooth, the lines 

 are in curves, with no angularity. From the vertex to the root of the 

 nose, the plane of the brow is in a straght line, with a slight rise be- 

 tween the horns. The accompanying drawings will at once give abet- 

 ter idea of the form than any description. 



There are six molars on either side of the upper jaw. The third of 

 the series, or last milk molar, has given place to the corresponding 

 permanent tooth, the detrition of which and of the last molar is well 

 advanced, and indicates the animal to have been more than adult. 



The teeth are in every respect those of a ruminant, with some slight 

 individual peculiarities. 



The three posterior or double molars are composed of two portions 

 or semi-cylinders, each of which incloses, when partially worn down, a 

 double crescent of enamel, the convexity of which is turned inwards. 

 The last molar, as is normal in ruminants, has no additional complica- 



