ORDER RUMINANTIA. 253 



whether the Acuticornis be not the same species, with the 

 spurious horns and anterior part of the frontals wanting, 

 but this, nevertheless, much smaller. 



The Awl-homed Antelope. (A. Subulata.) The horns of 

 this unquestionable species, attached to the frontals, are 

 likewise in the Royal College of Surgeons ; they are not 

 above three-eighths of an inch in diameter, subvertical, 

 round, smooth, black, four inches and a half long, bending 

 outwards in the middle, and the points again a little in- 

 wards, one inch and two lines asunder at base, two 

 inches distant about the middle, and something less at the 

 points ; they stand higher on the frontals than the preced- 

 ing, the sinciput is broader, round, and placed on a nar- 

 rower parietal. The specimen was likewise brought from 

 the East. 



The Tetracerine Group. 



There are few or no examples of animals in a state of 

 nature, beside the present, who have four horns as a per- 

 manent character. The Colus, indeed, is reported to be 

 found sometimes with three, and several breeds of sheep 

 have four, five, or six horns, but these are invariably mon- 

 strous productions, issuing from nearly the same base, and 

 constituting a morbid superabundance of that organic sub- 

 stance. In the Tetraceri, however, these productions are 

 constant and uniform, the upper or true pair rising on the 

 frontal crest, and the lower, or spurious, as invariably be- 

 tween the orbits. Skulls of these animals have been pre- 

 served for years in the Museum of the Royal College of 

 Surgeons, and in the superb collection of Mr. Brooks. 

 From the former M. de Blainville published an account of 

 a species ; but we are indebted to the investigations of Ge- 

 neral Hardwicke for a complete description of the animal. 

 For although M. F. Cuvier produced a figure, his notice 

 communicated by the late M. Duvaucel, is not sufficiently 



