166 CATALOGUE OF UNGULATES 



2. SUBGENUS HYLARNUS. 



Hylarnus, Thomas, Ann. Mag. Nat. Hist. ser. 7, vol. xviii, p. 149, 

 1906. 



Premaxillo-maxillary vacuity present ; muzzle relatively 

 short, so that front border of orbit is situated above the last 

 upper premolar ; hind border of palate about on line of hind 

 outer angle of third upper molar ; nasals broad above ; horns 

 short, stout, smooth, except at the base, inclining backwards 

 nearly in the frontal plane. 



The distribution is restricted to the equatorial forest 

 region. 



In describing the type species (as Neotragus) de Winton 

 remarked that it "somewhat bridges over the differences 

 between this genus and the East African Nesotragus, and 

 practically reduces the distinguishing characters to those of 

 the horns alone." Thomas, again, in describing the second 

 species and establishing the genus Hylarnus, also remarks that 

 these antelopes are in many respects intermediate between 

 sunis and the royal antelope. In the opinion of the present 

 writer, this affords reason for including the whole group in a 

 single genus. 



The two species of the present group may be distinguished 

 as follows : 



A. Dark and light areas moderately distinct N. batesi. 



B. Dark and light areas more sharply denned ; the former 



deeper and the latter brighter N. harrisoni. 



III. NEOTKAGUS (HYLAKNUS) BATESI. 



Neotragus batesi, de Winton, Proc. Zool. Soc. 1903, vol. i, p. 192, 

 pi. xix ; Lydeltker, Game Animals of Africa, p. 184, 1908. 



Hylarnus batesi, Thomas, Ann. Mag. Nat. Hist. ser. 7, vol. xviii, 

 p. 149, 1906 ; Bates, Proc. Zool. Soc. 1905, vol. i, p. 77. 



Typical locality Cameruns. Type of Hylarnus. 



Size nearly half as large again as in the royal antelope 

 (infra, p. 169). General colour a deeper rufous, with a 

 tendency to dusky, the feet less rufous, and the white of the 

 under-parts less pure ; front of face, crown of head, and neck 

 dark smoky brown ; back and upper side of tail more rufous 



