This name has been proposed for the form of _Lithocranius_ that occurs in Somaliland. It is rather larger and has finer horns, as we have stated (see our remarks, vol. iii. p. 230). It is now pointed out that the typical form of East Africa is redder than that of Somaliland, that it has black knee-tufts, and shows a slight difference in the white markings of the tail. Genus HIPPOTRAGUS. (Vol. IV. p. 3.) Hippotragus langheldi. _Hippotragus langheldi_, =Matsch.= SB. Ges. nat. Freund. Berlin, 1898, p. 182. Under this name it seems that the same geographical form is described as that which we have called _Hippotragus equinus rufo-pallidus_ (suprà, p. 14), ex _H. rufo-pallidus_, Neumann, P. Z. S. 1898, p. 850. The type of _H. langheldi_ is from Tabora, German East Africa; it is diagnosed as follows:—“_H. bakeri_ affinis; colli jubâ tricolore, subtùs albâ, supernè brunneâ nigro marginatâ; pectore nigrescente, caudæ basi nigerrimâ.” INDEX. [Trasncriber's Note: Pages to Vol. I, II and III are indicated by the book number before the page number. Example: page 5 in book 71222-h is shown as 71222-5] _Acronotus_, i. 71122-5 —— _bubalis_, i. 71122-7, 71122-15 —— _caama_, i. 71122-33, 71122-39 —— _lelwel_, i. 71122-8 —— _lunatus_, i. 71122-85 _Addax_, iv. 1, 77 —— _addax_, iv. 80 —— _naso-maculatus_, iv. 77, =79=, (=Pl. lxxxvi.=), 80 —— _suturosus_, iv. 79 _Adenota_, ii. 71134-95 —— _kob_, ii. 71134-131 —— _koba_, ii. 71134-131 —— _lechee_, ii. 71134-127, 71134-149 —— _leucotis_, ii. 71134-127 —— _megaceros_, ii. 71134-121 —— _sing-sing_, ii. 71134-105 _Ægoceros bakeri_, iv. 14 —— _koba_, iv. 15 —— _leucophæus_, iv. 14, 15 —— _niger_, var. _kirkii_, iv. 32 _Æpyceros_, iii. 71179-2, 71179-15 —— _melampus_, iii. 71179-15, 71179-=17=, 71179-(=Pl. xlviii.=), 71179-25 —— —— _holubi_, iii. 71179-18 —— —— _johnstoni_, iii. 71179-18 —— —— _typicus_, iii. 71179-18 —— _petersi_, iii. 71179-=25= —— _suara_, iii. 71179-18 _Aigocerus_, iv. 3 —— _barbata_, iv. 14 —— _ellipsiprymnus_, ii. 71134-97 —— _equinus_, iv. 13 —— _harrisi_, iv. 32 —— _leucophæus_, iv. 6, 14 —— _niger_, iv. 31 _Alcelaphus_, i. 71122-5 —— _albifrons_, i. 71122-79 —— _bubale_, i. 71122-8 —— _bubalinus_, i. 71122-8 —— _bubalis_, i. 71122-8, 71122-39 —— ——, var. _tunisianus_, i. 71122-11 —— _caama_, i. 71122-21, 71122-34, 71122-39, 71122-45 —— _cokei_, i. 71122-27 —— _hunteri_, i. 71122-53 —— _jacksoni_, i. 71122-39 —— _lichtensteini_, i. 71122-27, 71122-45 —— _lunatus_, i. 71122-85 —— _major_, i. 71122-11 —— _pygargus_, i. 71122-74 —— _senegalensis_, i. 71122-59 —— _tora_, i. 71122-15 —— _(Damalis) hunteri_, i. 71122-53 _Alces oreas_, iv. 198 Algazel, iv. 43 _Ammodorcas_, iii. 71179-2, 71179-217