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Show 1873.] SIR V. BROOKE ON THE GENUS GAZELLA. 537 my identification, I have never experienced any difficulty in referring specimens entirely new to m e to their proper name and habitat. The descriptions must be taken as applying to thoroughly typical specimens, the intensity of the markings and length and curvature of the horns being subject to great individual variation. The height given is that taken in a straight line from the ground to the point of the shoulder, the male being the sex measured, excepting where the contrary is stated. GAZELLA. Frame slender. Muzzle ovine. Colour sandy. Skull with anteorbital vacuity, and a moderate or small anteorbital fossa ; auditory bulla large. Median incisors expanded. A. Back unstriped. Dentition i. |, c. °, p. |, m. |. A'. White of rump not encroaching on the fawn-colour of the haunches. A. Males and females bearing horns. a'. Horns lyrate or semilyrate. I. Gazella dorcas. 4. Gazella leevipes. 2. isabella. 5. melanura. 3. rufifrons. b'. Horns non-lyrate. 6. Gazella cuvieri. 9. Gazella arabica. 7• leptoceros. 10. bennettii. 8. spekii. 11. fuscifrons. B. Females hornless. 12. Gazella subgutturosa. 14. Gazella picticauda. 13. gutturosa. B'. White of rump projecting forwards in an angle into the fawn-colour of the haunches. 15. Gazella dama*. 17. Gazella soemmerringii. 16. mohr. 18. granti. B. Back with a white median stripe. Dentition i. g, c. j, p. -2, m. 19. Gazella euchore. 1. GAZELLA DORCAS. 1764. La Gazelle, Buff. Hist. Nat. vol. xii. p. 249, pl. 23. Kevel, Buff. Hist. Nat. vol. xii. p. 258, pl. 26. 1766. Capra dorcas, Linn. Syst. Nat. p. 96? 1766. Antilope dorcas and A. kevella, Pallas, Misc. p. 6 (after Buff.). * I include G. dama in this subsection, as, although from the great extension of white over the posterior parts of the back the characteristic angular white patch is not visible, the general form of the animal leaves no doubt as to this being its proper position. |