ORDER UNGULATA. 



1347 



fined to Africa and Syria, the existing genus Alcelaphus represented 

 in the later Tertiaries of Algeria, and also in the Pliocene Siwaliks 

 of India ; the species from the latter deposits being apparently 

 allied both to the Hartebeast (A. caamd) and the Bontebock (A. 

 pygargus). These antelopes have recurved or lyre-shaped horns ; 

 their skull has no supraorbital pits, and may have a very long 

 face ; while the molar teeth are very narrow. In the Cephalopine 

 section, comprising Indian and African species of comparatively 

 small size, the existing Four-horned Antelope (Tetraceros quadri- 

 cornis) is found in a fossil state in the cave-deposits of Madras ; 



Fig. 1221. — Inner and outer views of the second left upper true molar of the Nilghai 

 (Boselaphus tragocamelus). Recent ; India. 



while an extinct species occurs in the Siwaliks. The African genus 

 Cephalopus may perhaps also occur in the latter deposits. The 

 Cervicaprine section is now confined to Africa, and includes some 

 very large antelopes in which the females are hornless. Co&us, in 

 which the skull has well-marked supraorbital pits, appears to be 

 represented in the Indian Siwaliks by species as large as some of 

 the African forms. In the Pliocene Pikermi beds of Greece an 

 antelope with round lyrate horns, described as Jle/icop/zora, 1 appears 

 to be allied in some respects with Cobus, although it has lachrymal 

 vacuities, but no distinct supraorbital pits. In the typical Antelopine 

 section, which is allied in many respects to the preceding, there are 

 always well-developed supraorbital pits, and the molar teeth are 

 hypsodont, and resemble those of the sheep. The type genus 

 Antilope, which has round and spirally twisted horns, is known in 

 the Pleistocene of India by remains of the one existing species A. 

 cervicapra (Black-buck) ; the existing Siberian Saiga tartarica is 



Originally described under the preoccupied name of Helicoccros. 



