184 CEPHALOPIIUS SILVICULTOR. 



up are so small that they may be called of no conse- 

 quence, with the exception however of two points, viz. : 

 1° the horns and 2° the molars. 



1° The horns. They indeed are much shorter in the 

 female than in the male of silvicultor; in our female-spe- 

 cimen of silvicultor they are exactly of the same size as 

 the horn figured — natural size — by Afzelius, namely 

 10 cm., meanwhile those of the Jentinki-fema.\e measure 

 18 cm.; the horns of the msde-silvicultria; attain a length 

 of 16.5 cm., that means therefore that they are even less 

 developed in the male of silvicultor than in the female of 

 JentinJci. Here again is a great difference with »the Book 

 of Antelopes", where we find: » horns of uiale and female 

 (of silvicultor) almost precisely alike, except that the latter 

 are slightly smaller '). Length (cT) 6.4 inches". The length 

 of the female-horn has not been recorded there ; now 6.4 

 inches is about the length above measured by me, I how- 

 ever cannot entitle a difference of 16.5 — 10 cm. = 6.5 cm. 

 a slight one. 



2* The molars. Every true upper molar of silvicultor 

 shows a rather strongly developed column on its inside and 

 every true lower molar of silvicultor bears a ditto but much 

 shorter column on its outside: of such columns there is 

 on the anterior upper and lower true molars only an insig- 

 nificant trace in Jentinki although the molars for the rest 

 agree very strikingly with those of silvicultor. 



These columns are very commonly to be found among 

 the Cervidae, however from all the skulls of Antilopidae 

 in our collection I only could find them represented in 

 Kobus defassa, Kohns ellipsiprymtius, Oryx leucoryx, Oryx 

 gazella, Uippotragus niger and Strepsiceros strepsiceros. No 

 other Cephalophus-STpecies shows such extra columns, so 

 that silvicultor makes a very striking exception ! 



Differences of less importance are : that in silvicultor, like 

 in other Cephalophus-s]^ecies , the face-line is more curved 



1) I italicize. 



Notes from the Leyden ]Museum, "Vol. XXII. 



