VOL. IV. 88. Frontlet of the Blue-buck 11 89. Horns of Baker’s Roan Antelope 25 90. Head of Roan Antelope 29 91. Head of Sable Antelope 38 92. A Leucoryx attacked by a Lion 48 93. Young Leucoryx 49 94. Female Beisa 70 95. Horns of male Addax 83 96. Horns of female Addax 83 97. Head of a female Addax 85 98. Skull and horns of an adult male Nilgai 100 99. Frontlet of an adult male Nilgai 101 100. Skull and horns of Cumming’s Bushbuck 126 101. Frontlet of Cumming’s Bushbuck 127 102. Delamere’s Bushbuck 130 103. The Bongo Antelope 134 104. Head and horns of the Broad-horned Antelope 135 105. Head and horns of Angas’ Antelope 140 106. Angas’ Antelope, ♂ & ♀ 146 107. Horns of _Tragelaphus_ sp. inc. 147 108. Speke’s Sitatunga in a Papyrus-swamp 153 109. Horns and feet of Speke’s Sitatunga 154 110. Speke’s Sitatunga, ♂ & ♀ 156 111. Outer view of right foot of Selous’s Sitatunga, ⅓ nat. size 158 112. Horns of Congan Sitatunga 167 113. Head of Congan Sitatunga, from the specimen in the British Museum 169 114. Male and female Kudu 183 115. Horns of Lesser and Greater Kudus 188 116. Skull and horns of Livingstone’s Eland, ♂ 205 117. Horns of _Taurotragus oryx gigas_ 208 118. Abnormal horns of female Eland 209 119. Herd of Derbian Elands 218 120. Horns of Derbian Eland 219 121. Front view of the horns of the Derbian Eland 221 ALPHABETICAL LIST OF THE ABBREVIATIONS USED IN THE REFERENCES TO LITERATURE, AND EXPLANATIONS OF THEM[1]. _Abh. Ak. Berl._--Abhandlungen der königlichen Akademie der Wissenschaften zu Berlin. 4to. Berlin. _Act. Ac. Imp. Sc. Petrop._--Acta Academiæ Scientiarum Imperialis Petropolitanæ. 4to. Petropoli.