O CATALOGUE OF UNGULATES 



skull short (fig. 2) ; ears more or less elongated ; tail long, 

 in wild forms terminally tufted, or more or less hairy 

 throughout its length ; a bare callosity, or " chestnut " on 

 the inner side of each fore-leg above the " knee " (carpus). 



Distribution, at the present day, co-extensive with that 

 of the family. 



The genus is divisible into the following subgeneric 

 groups : 



A. Head and neck (like body) devoid of stripes. 



a. Ears relatively short ; hoofs broad Equus. 



b. Ears longer ; hoofs narrower Asinus. 



B. Head and neck (and in most cases the body) marked 



with numerous dark and light stripes, which are 

 transverse on the neck (and body). 



a. Ears very broad and densely haired internally Dolichohippus. 



b. Ears narrow and sparsely haired internally Hippotigris. 



1. SUBGENUS EQUUS. 



Equus, H. Smith, Jardine's Naturalist's Libr., Mamm. vol. xx, 

 p. 192, 1841 ; Pocock, Ann. Mag. Nat. Hist. ser. 7, vol. x, p. 304, 

 1902 ; Heller, Smithson. Misc. Collect, vol. Ix, no. 8, p. 2, 1912. 



I. EQUUS CABALLUS. 



Equus caballus, Linn. Syst. Nat. ed. 10, vol. i, p. 73, 1758, ed. 12, 

 vol. i, p. 100, 1766; Griffith, Animal Kingdom, vol. iii, p. 341, 

 vol. v, p. 294, 1827; Gray, Cat. Ungulata Brit. Mus. p. 263, 

 1852; Flower and Garson, Cat. Osteol. Mus. R. Coll. Surg. 

 pt. u, p. 395, 1884 ; Flower, The Horse, p. 72, 1891 ; Ridgeivay, 

 Thoroughbred Horse, p. 12, 1905 ; Lydckker, Horse and its 

 Relatives, p. 103, 1912. 



A. Equus caballus caballus. 



Equus caballus typicus, LydekJcer, Proc. Zool. Soc. 1904, p. 432, 

 Horse and its Relatives, p. 176, 1912. 



Including : 



Equus ferus, Pallas, Zoogr. Rofso-Asiat. vol. i, p. 260, 1811. 

 Equus gmelini, Antonius, Naturwiss. Wochenschrift, ser. 2, vol. xi. 

 p. 516, 1912. 



Typical locality Scandinavia, with the possible exception 

 of the Arab and its derivatives, this race is taken to include 

 all domesticated breeds, together with the half-bred so-called 



