Mateeial foe the Study of Ruminants. 



41 



than between the former and other Gavicornia. At the same time the 

 brain of Cephalophus shows several primitive characteristics and is less 

 specialised than the same of the ovine and bovine sections. 



8) A foetus of Cephalophus ogilb/ji c /'., Measuring from the fore- 

 head to the anus 180 mm. and from the snout to the occiput 73 mm. 

 It is quite naked, the rhinarium and the posterior third of the ear is 

 pigmented. The bristles above the upper eyelid begin to appear and 

 the cushion between the rami of the mandible is quite plainly promi- 

 nent, although the bristles are not developed. 



The pores of the anteorbital gland form a straight, series of 13 

 groups of pores. Each group seems to be constituted by a trans- 

 versal (vertical) row of three or four pores, which sometimes are not 

 regularly arranged. 



The situs viscerum is similar to that of the specimen described 

 below and termed i., but the liver is comparatively larger. A com- 

 parison of the different organs of this foetus and the following termed 

 i. will be made further below. 



9) A foetus of Cephalophus ogilbyi o %. } Measuring from the fore- 

 head to the anus about 250 mm., and from the snout to the occiput 

 about 98 mm. The eyelids are closed and the body is naked, but on 

 the head there is some hair, especially on the top of the same, on 

 the lips and the chin. From the region between the eyes short, partly 

 blackish, but also partly rufous, hair covers the forehead up to the 

 horn-centres or the places where the horns should appear later. It 

 is directed backwards but on the sides obliquely so that, so to say, a 

 fanshaped whorl is formed. In the median line the black, on the sides 

 the rufous colour is dominating. Posteriorly the hair increases in 

 length especially towards the horn-centres. A similar »fan» of alto- 

 gether rufous hair begins between the ears and is directed forwards. 

 This posterior and the anterior system of hairs meet along a straight 

 transversal line drawn from one horn-centre to another and along 

 that line all hairs on either side point towards the horn-centre. The 

 area between the upper eyelelid and the ear is covered by short 

 rufous (and some few blackish) hairs with an oblique downward and 

 backward direction. At the anterior ear-margin these are a little denser 

 than elsewhere. The ears are pigmented on the back and posterior 

 third but quite naked. On the eyelids some scattered hairs are found 

 becoming more numerous towards the margins. About a dozen fine 

 bristles are found situated in two series above the upper eyelid. In 



Nova Acta Reg. Soc. Sc. Ups. Ser. III. Impr. î7 /r 1903. (i 



