1891.] MR. O. THOMAS ON UNGULATES. 387 



1. Lama huanachus, MoI. The Hnanaco. 



Domestic races of 1 : — 



a. L. glama, L. The Llama. 



b. L. pacos, L. The Alpaca. 



2. L. vicugna, Mol. The Vicugna. 



3. The Bush-bucks {Tragelaphus). 



The larp;er species of this genus were worked out by Sir Victor 

 Brooke^ in 1871, and the only alteration which further material 

 renders necessary in his account is that all the specimens from 

 W. Africa, considered by him to belong to T. spekei, Scl., are really 

 referable to T. gratus, Scl. 



This well-marked species, described from a female skin in 1 880 ', 

 nine years after Brooke's paper, was reallv represented then by 

 several skulls and horns in the Museum collection, viz. the speci- 

 mens referred to by him under T. spekei as b, d, and e in his " List 

 of specimens examined." The skin e, however, was in so bad a 

 condition that the colour-charncters did not give rise to a suspicion 

 of specific distinction, and without such a suspicion tbe horns would 

 be not unnaturally looked upon as, and compared with, immature 

 horns of T. spekei. Knowing, however, the species T. gratus from 

 Mr. Sclater's excellent figures, one may always readily distinguish 

 the horns by their shortness, stoutne.'s, and less amount of curve, 

 the extra twist found in T. spekei, which approximates that species 

 so much to Strepsiceros, being never found in the oldest examples 

 of T. gratus. This is well seen on a comparison of Brooke's figure 

 of T. spekei {t. c. p. 486) with that given by Sclater (P. Z. S. 1883, 

 p. 36) of the head of the fine Gaboon specimen of T. gratus now in 

 the British Museum. 



The revised ranges of the four large species appear therefore to be 

 as follows : — 



1. T. EURYCEROS, Og. 



Hab. W. Africa. Liberia (Biittikofer) ; Fantee {Mus. Brit.) ; 

 Ashkankoloo Mountains, Gaboon {^Du Ghaillu, Mus. Brit.). 



2. T. angasi, Angas\ 



Hab. S.E. Africa. Poiigola River, Zululand {Eastwood, Mus. 

 Brit.); Maputa River {Proudfoot, Mus. Brit.); St. Lucia Bay 

 {Angas ; Fellowes, Mus. Brit.). 



3. T. GRATUS, Scl. 



Hab. West Africa. Kokki, Cameroons {Allen, Mus. Brit.) ; 

 Gaboon {Du Ghaillu et al., Mus. Brit., Mas. Paris). 



1 P. Z. S. 1871, p. 482. 



» P. Z. S. 1880, p. 452. 



^ Gray never published any description of this species, and iberei'ore Mr. 

 Q. French Angas's account (P. Z. S. 1848, p. 89) must be taken as the original 

 description. The species was named after Mr. G. Fife Angas, the father of 

 Mr. G. French Angas, C.M.Z.S. 



