QUATEENAET FAUNA OF GIBRALTAR. 



105 



in JR. megarhinus is 4""2, whilst in the far smaller astragalus of S. hemitcechus the cor- 

 responding arc measures 4""4. 



The Gibraltar astragalus agrees with that of R. hemitcechus (1) almost exactly in 

 size .and proportions, (2) in the comparative flatness of the scapho-cuboid facet ; and 

 with that oi R. megarhinus it agrees (1) in the form of the external calcaneal facet 

 (vide PI. XV. fig. 2), (2) in the termination of the crescentic internal malleolar 

 facet at some distance behind the anterior border, as shown in the accompanying 

 woodcut. But it difl'ers from both in the greater proportional width of the cuboid 



Fig. 5. 



Astragalus of Rhinoceros from Gibraltar. 



facet, which stands to that of the scaphoid as 660 to 1000, and in having a marked con- 

 striction {a in woodcut) in front of the anterior termination of the crescentic facet, in 

 which respect, though to a much less extent, it bears some resemblance to R. ticho- 

 rhinus, though differing very widely in all others. It does not appear necessary to con- 

 sider the relations of the Gibraltar bone with the astragalus of R. etruscus, nor with 

 that of R. bicornis, its difference from both being too obvious to require comment. 



6. Metatarsus. 



The bones belonging to this part of the skeleton are: — two right third metatarsals, 

 one entire, and the other represented by the proximal half; and two right fourth meta- 

 tarsals, one of which also is entire, and of the other only the proximal half remains. 



The entire third and the broken fourth metatarsals fit so exactly to each other, and 

 correspond so precisely in colour and condition generally, that there can be no doubt 

 of their belonging to one and the same individual. The entire fourth metatarsal, and 

 the broken third do not fit very exactly; but this may arise in part perhaps from 

 the circumstance that the third is a good deal worn. The bones, however, differ 

 somewhat in colour, and were apparently found a good way apart; so that the pre- 

 sumption would appear to be in favour of their belonging to distinct individuals. 



