302 CLASS MAMMALIA. 



the ears appear shorter, but the horns, of a dirty colour, are 

 superior in length to those of the Ibex, forming a half cir- 

 cle, closer on the forehead, less diverging backwards ; they 

 are subtriangular, having a round edge to the front, marked 

 in one pair with twenty-three very elevated cross ridges, 

 extending to near the posterior edge, and rather irregular 

 in their distances ; besides these, four others less prominent 

 appear near the base, and from the thirteenth the larger 

 knots are separated by three smaller. This species, we are 

 told, is numerous in the mountains of Abyssinia and of 

 Upper Egypt ; it extends, probably, also over the range of 

 Atlas, and may be the Baeden (though, indeed, from the 

 name, we suspect this to refer to Ovis,) of the Dsjac range. 

 There is ari undescribed head in the Royal College of Sur- 

 geons, considered as belonging to iEgagrus : it is a younger 

 animal, but, in all probability, of the same species, and 

 similar to one which we compared, and came from Mount 

 Sinai ; it differs from the above in the elevated knots being 

 very regularly divided, and numbering only six, though in 

 their length they exceed those of an Ibex of Europe, which 

 have fifteen. If these be of the same species, the commu- 

 nity of habitat is established for them to both shores of the 

 Red Sea ; and it may be inferred that the ips Ako or Akko 

 of Deuteronomy, applies to this animal. 



The Caucasian Ibex. (C. Caucasica.) M. F. Cuvier dis- 

 tinguishes this species from iEgagrus " by the horns being 

 triangular, the anterior face forming an angle, with ribs or 

 projecting knots." This definition would apply to the 

 Abyssinian ; it is therefore necessary to add, that the knots 

 are progressively more distant from each other as they recede 

 from the base, with uniform transverse wrinkles, not so 

 prominent, confused, and crowded, as in the former. M. 

 Guldenstadt first described the species, which he discovered 

 in the northern part of the Caucasian Mountains. In size 

 and proportions it resembles the Ibex of Europe, but is 



