Baces of African Ungulates. 39 



A form of the western sliort-horned unctuosus-^ecixon of 

 Kubus defassa uith a massive skull and strongly curved 



horns. 



Skull. Very heavy, slightly larger than in K. d.unctuosus ; 

 facial portion rather short and narrow, preniaxiHaries not 

 widened at all and square in front. Upper orbital margin 

 not projecting at all, lower rather conspicuously. 



Horns short, as in K. d. unctuosus, with short tips, which 

 are strongly bent upwards or inwards. 



Dimensions of tijpe skull. Basal length 362 mm.; upper 

 length 393; palatal length 209; palatal width inside 7«2 55*5 ; 

 postorbital width 157 ; zygomatic width 147 : breadth of 

 rostrum across premaxillse 56-5; length of upper tooth-row 

 (alv.) 989 ; horns, length along curve 610, greatest dia- 

 meter at base 71 0. 



Adenota kob riparia, subsp. n. 



Type lucalily. District of Kpandu, W. Togo. 



Type. cJ adult. Senckenberg Museum. Journal no. 402 



(skull). 



A member of the western group of small ''kobs,'' still 

 smaller than A. kob kob from Senegambia. 



Skull. Smallest of any described race, but very broad. 

 Orbit strongly projecting, even more so than in A. k. nigri- 

 cans, in which the postorbital breadth is slightly greater, but 

 the lower margin of the orbit less projecting. Facial portion 

 of skull short and broad ; rostrum very short; nasals 

 narrow. 



Horns much as in A. k. kob, but shorter and rather more 

 curved in their basal and middle portion; distinctly thicker, 

 with shorter tips, which are much more curved forwards. 



Dimensions of type. Upper length 253 mm. ; palatal length 

 134 ; palatal widtli inside nr 33*5 ; postorbital width 107 ; 

 zygomatic width 99 ; occipital width 83 ; nasals, length 96*8, 

 greatest breadth 19-3 ; breadth of rostrum across pre- 

 maxillee 329 ; length of rostrum (gnathion to p-) 78-9 ; 

 length of upper tooth-row (alv.) 65-5 ; horns, length along 

 curve 345, greatest diameter at base 47*6. 



The Togo " kob " is the smallest race of this group known 

 to me. It is at once known by its short broad skull, short 

 rostrum, and strongly projecting orbits. 



A. k. niyricuns, Lydekker, from Sierra Leone, has a much 

 longer rostrum ; it was originally described on account of 

 the*' dark colour of a female in the British JNIuseum, a 

 c"haracter which is not at all constant in that race, but seems 



