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



1. Lama huanachus, Mol. The Huanaco. 



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 {Tragelnphus). 



Tlie larger 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 1880 ^, 

 nine years aiter Brooke's paper, was really represented then by 

 several skidls 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-characters did not give rise to a suspicion 

 of specific distinction, and without such a suspicion the 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, stoutness, and less amount of curve, 

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

 so much to Si?-epsiceros, 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. 2>&) of the head of the fine Gaboon specinlen 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 Chaillu, Mus. Brit.). 



2. T. ANGASi, Angas\ 



Hab. S.E. Africa. Pongola 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 Chaillu et al., Mus. Brit., Mus. Paris). 



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



» P. Z. S. 1880, p. 452. 



^ Gray never published any descx-iption of this species, and therefore Mr. 

 Gr. 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. 



