TUiJ GUYSBACK, &C, 
223 
figuration, in the animals belonging to it possessing 
lour horns. It has been named as a subgenus Telra- 
ccrtts. It appears that there is a possibility of two 
species with four horns existing, in the one perfectly 
smooth, in tlie other, rugged at the base ; the niate- 
lials, however, for establishing the latter, are imper- 
fect ; and, at present, wo shall confine ourselves to 
that first described by General Hardwicke. 
