2, and Plate oo, fig. o of tliis Atlas. The figure of Skull N in Plate 17 is from a plioto- 

 grapli supplied l)y the Madrid Museum. 



Sknll 0. — In the Genoa Museum. From a photograph supplied l>y the Genoa 

 ^Museum. Skull is -without horns, and is evidently not the skull of the same animal as 

 the skin mounted in the Genoa Museum, of which the legs are figured in Plate Si, fig. 1. 



Skull P. — In the Paris Museum (Museum d'Histoire Naturelle). The skull of a com- 

 plete skeleton. From a photograph supplied by the Paris Museum. The ossicones are 

 figured in Plate 2. The skull is figured by M. de Rothschild and H. Xeuville, 'Ann. Sci. 

 Xat., Zool.,' vol. X, Nos. 1 and 2, ISJOO, pp. J.-), 22, and 29. Apparently this is not the 

 skull corresponding with the mounted skin in the Paris Museum, of which the legs are 

 figured in Plate 3o, fig. 1 ; for although in the paper by Rothschild and Xeuville the 

 skeleton and skin are regarded as from the same animal (p. 2, " Un seul si)ecinu'n 

 d'Anatomie comparee "), Fraipont states that the skeleton (Xo. oUl) corresponding with 

 the Paris skin (Xo. oUo) went to Stockholm, and that the skin (No. 531<) corresponding 

 with the Paris skeleton (No. o'o'j) is at Tervueren (' Aunales du Musee du Congo, Zool.,' 

 ser. 2, vol. i, " Okapia," 1007, p. 14', ])aragr. 7 and '.•). In this case Skidl P corresponds 

 with the legs figured in Plate o8, fia". 2. 



Eleven of the above fifteen skulls Avere examined at the British Museum (Natural 

 History), and the relative ages of these may be approximately determined by the following 

 particulars of the dentition and sutures. J is clearly the youngest of the series; the 

 deciduous luolars are only moderately worn, and the third true molar has not 3'et developed. 

 F is somewhat older than J ; the thi'ee deciduous molars are in use, the third molar is 

 present, but has not yet cut the gum. (' is older still; the three deciduous molars are in 

 use, the third molar has cut the gum and is slightly worn. A and D are almost of the 

 same age as (', l»ut a little older; the third molar shows rather more signs of wear. The 

 three deciduous molars are still in use in both. In the extent of wear of the hindermost 

 molar tooth in the lower jaw, and in the fact that the left permanent canine is already in 

 use, D would appear to be slightly older than A ; but in I) the third deciduous incisor has 

 not l)een shed, whereas in A it has, and the ])Osterior or fifth cusp of the third molar in 

 the lower jaw is not so freely exposed as in A. 



])i the following skulls there are no milk teeth remaining. B is a little older than A 

 and I), and E, G, H, K and L are the oldest of the series, and hardly distinguishable the 

 one from tiie other as regards age. In B the horns or ossicones are not yet ankylosed 

 to the skull, and the i)arieto-frontal suture is very distinct. In E, G, H and L the ossi- 

 cones are fused on, and the i)arieto-frontal suture is obliterated. In K there are no ossi- 

 cones, and the pai-ieto-frontal suture is ol)literated. In E and 11 the lachrymo-malar and 

 fronto-malar sutures persist; in K the lachrymo-malar suture is present, but not the 

 fronto-malar ; in G and L both have disappeared. 



