1907.] RUDIMENTARY ANTLERS IN THE OKAPI. 129 



the skin sent home by Sir Harry Johnston) and 0. liehrechtsi, 

 the name given by Dr. Forsyth Major to the more elongate and 

 narrow type of skull, which is that usually provided with bony 

 cones attached to or ankylosed with the frontal bones. It is 

 important to note that Dr, Major figures a skull (Proc. Zool. 

 Soc. loc. cit. p. 423) which is hornless and is regarded by him 

 as that of a female of the elongate type, 0. liehrechtsi. I hope 

 shortly to publish some measurements and outlines of these two 

 types of skull. I have examined three of the 0. johnsto7ii-tjpe, 

 and five of the 0. liehrechtsi-tj])e. Though there is considerable 

 variation in the number and iDreadth of the white stripes on the 

 fore and hind limbs of the skins of Okapi received in this country 

 (including the excellent specimens obtained independently by 

 Major Powell Cotton and by Captain Boyd Alexander from widely 

 sepai'ated localities, the former from the Ituri Forest, the latter 

 from the Welle River), I have seen no evidexace that a different 

 striping of the skin is associated with the difference of skull-form. 

 On the contrary, there is positive evidence that the striping of 

 the skin is very nearly identical (though no two specimens are 

 exactly alike) in animals which possessed the liehrechtsi form of skull 

 with that exhibited by the mounted specimen {O.johnstoni) with 

 hornless skull, sent home by Sir Harry Johnston, figured by me, 

 and now in the British Museum. Nevertheless, it is true that 

 direct and convincing evidence is as yet wanting for the conclusion 

 that 0. liehrechtsi is merely the male of 0. johnstoni. 



When I had an opportunity (in 1904) of examining the fine 

 skin of the adult (supposed) male Okapi, presented by the Congo 

 State to the Museum of Paris, which is set up in the public 

 gallery there, I was especially anxious to note the state of the 

 horn-tips. I found that they were rej)resented in the mounted 

 specimen and were seen projecting through the skin which 

 clothed the "ossicone" up to a limit of about half-an-inch from 

 the tip. From this level the dense bony matter was naked. 

 It showed in each hoi-n two fine transverse grooves, as in 

 the ossicone examined and sliced by Dr. Forsyth Major. This 

 went fai- to prove that the condition noted by him was not 

 exceptional or morbid, and accordingly I have examined the 

 ossicones of other specimens of adult male Okapis, as opportunity 

 occurred. Several skins and imperfect skeletons have been 

 received in London by dealers in zoological specimens, and I am 

 especially indebted to Messrs. Rowland Ward & Co. for the 

 opportunity of examining the ossicones of four adult Okapis. 

 Of two of these individuals I have had the ossicones drawn 

 (PI, VI.) so as to show the free termination from different points 

 of view. The two other specimens examined by me presented 

 the same remarkable appearances as those figured, and as shown 

 by the Paris Okapi, but I was unable to procure carefully drawn 

 figures of them. Thus, including the Brussels skull examined 

 by Dr. Forsyth Major, I have ascertained the existence of these 

 transverse grooves or fissures in six adult male Okapis. I have 



Proc. Zool. Soc— 1907, K'o. IX. 9 



