OCR Text |
Show 1896.] ANTELOPE FROM EAST AFRICA. 193 A D E N O T A THOMASI, sp. nov. Colour nearly or quite the same as Adenota hob. Size larger. Skull and horns much larger than those of A. Icob. The ridges of the horns much more rounded and less sharp than in A. Icob. Colour of the horns basally light horn-yellow, gradually becoming darker at the points; while the horns of A. Icob are nearly uniformly blackish. Adenota vardoni, to which the horns of A. thomasi come nearest, although generally shorter, is distinguished by the total absence of black colour on the legs, while A. leche is distinguished by its far larger size and longer horns. Young specimens of A. Icob, A. thomasi, A. vardoni, and A. leche may be difficult to distinguish. Slcull Measurements. Greatest breadth. Adenota thomasi. a. Tvpe, ScottElliot, (Uganda.) millim. 131 267 b. Lugard. (Unyoro.) 94.5.4.3 (younger). millim. 121 248 Adenota hob. a. Stevens. (W. Africa.) 885 c. millim. 112 235 b. Lugard. (Niger-Benue Junction.) millim. 115 242 Horn Measurements. Adenota hob, Buff on. a. W . Africa, B.M. (Stevens) b. Niger-Benue Junction (Lugard).. Length straight. millim. 277 305 round curve. millim. 372 321 Ci i - ference. millim. 141 131 Tip to tip. millim. 144 159 Adenota thomasi, 0. N e u m. a. Type B.M., Uganda (Scott Elliot) c. Uganda, B.M. (Speke) d. Uganda, Berlin (0. Neumann) ... 369 378 375 410 464 470 458 512 178 166 190 178 267 213 251 153 PROC. ZOOL. Soc-1896, No. XIII. 13 |