The Four-horned Antelopes of India. 91 



it ; very acute, smooth, long, conic, accurately rounded ; basal rings 

 vague or wanting, not clearly marked as in the last. No longitudinal 

 striation. Anteal horns erect, shape of posteal pair and but one-third 

 less, very acute, rounded, smooth, with two to three vague striae 

 at their bases. 



Habitat — Saul forests. Sexes alike, save the dark mask proper to 

 the male. 



The two last species have been carefully compared with Chickara 

 and Quadricornis, to which they are respectively assimilated. The 

 resemblance they bear to these species is considerable at first view, 

 but they may be discriminated as follows — 



lodes from Chickara by its greater size, angular and (conspicu- 

 ously) ringed horns, reclining posteal horns, anteal horns strictly 

 interorbital, dark chaffron and fronts of limbs, the latter mark being 

 invariably found even in females and the young. 



Paccerois from Quadricornis by superior size, horns void of longi- 

 tudinal striation, suborbital sinus linear* and straight, and anteal 

 horns strictly interorbital and perfectly rounded on their sides. I 

 shall conclude the above tedious but necessary details with a more 

 popular description of the general aspect and structure of these 

 beautiful and interesting little antelopes, instancing more especially 

 the blunt horned species, or rusty-red Chousinga. 



This elegant little tenant of the deep recesses of the Saul forests, 

 much resembles in size and aspect the Ratwa, Kaker or barking 

 deer, which likewise abounds in the same site, but is also found in 

 the mountains above the forest, whereas the Chousingas never ascend 

 the hills. The rusty-red Tetracerus has a moderately-sized finely 

 shaped head, a bowed neck, a longish yet full body, limbs exquisitely 

 delicate but of moderate length, and a medial, rounded, and attenuat- 

 ed tail, very full of hair, and reaching nearly to the base of the 

 buttocks. The bridge of the nose is straight and much compressed. 

 The frontals are considerably arched in the region of the anterior 

 horns. The nose ends in a nude moist muzzle or mufle, as large as 

 in the axis, on which the wide lunate nostrils are opened laterally. 



* Is not the roundness of this sinus in Quadricornis a merely cranial pe- 

 culiarity ? I am satisfied of it by analogy. 



