320 EHINOCBBOTIDJi. 



There is a well-stuffed young specimen of this species in the 

 British Museum, and two skulls of adult and two of very young 

 animals. 



In the Museum of the Eoyal College of Surgeons is a very fine 

 adult skull of this species (no. 2960 a) with the two horns attached 

 to the skin. It was obtained from Mr. Gordon Cumming's col- 

 lection. It is 35 . inches long from the end of the nasal to the 

 occipital crest. The front horn is very long, slender, straight, and 

 recurved ; the front edge of the horn is worn by the animal rubbing 

 it on the ground. 



De BlainviQe obtained, when he was in London, from Mr. Burchell 

 the drawing of the head of this species (engraved in the ' Journ. de 

 Physique') ; but the horns were added after it passed out of Bur- 

 oheU's hands, and are not the horns of the species. 



In the British Museum there are two skulls of very young ani- 

 mals of this species that were received with the adult skulls in the 

 collection ; the mUk-grinders are being formed, but could only just 

 have been seen through the gums. The skulls are elongate, sub- 

 cylindrical, and have a rounded nose, with a large nearly hemi- 

 spherical prominence near the end of the upper surface for the 

 support of the front horn. The grinders are very large compared 

 with the size of the skuUs, and occupy a great part of the cavity 

 of the mouth ; the hinder one is placed in the centre of the length 

 of the underside of the skuU from the nose to the condyle. The 

 larger of these young skulls (1003 6) is very like the smaller one ; 

 but there is a fourth grinder being developed behind the third one ; 

 it is not elevated above the edge of the alveolus, and has no smooth 

 enamelled edge. The small first grinder is only very little more 

 developed than in the smaller skull. The line of grinders occupies 

 6| inches. The intermaxillary bones are deficient. The palate 

 ends, as in the smaller skull, in a line even with the back edge 

 of the third grinder. The hinder part of the skull has lengthened 

 more rapidly than the part in front of the edge of the palate. The 

 nasals are slightly longer, compared with the length of the skull, 

 than in the smaller specimen ; they are 4-^ inches long, the entire 

 length being very nearly 14 inches — that is to say, nearly three- 

 tenths of the entire length. The front of the nasal is more dilated 

 on the sides, and becoming broader and more truncated as in the 

 adult skulls. 



The lower jaw of this specimen is considerably longer than the 

 other ; and there is little difference in the state of the teeth, except 

 that the second and third grinders on each side are higher out of 

 the gums, rather more worn on the edge, and the first and fourth 

 grinders are rather more developed and larger, the first on the two 

 sides not being quite equally developed, but one more exposed than 

 the other. 



The smaller specimen (1003 c) has three grinders appearing ; the 

 smallest front one is least developed, hardly raised above the alveolus, 

 and not showing any smooth enamel ; the second and third grinders 



