640 CLASS XVII. 



brown with black stripes, belly and legs white ; very shy, lives in troops 

 of 80 to 100 together; the Khoua Khoua of the Hottentots; — Equus 

 Burchellii FiscH., Equus zehra Burchell, Equus f est ivus Wagn., Equus mon- 

 tanus F. Cuv., Griffith, Geoffr. Saint-Hilaire et F. Cuvier Mammif. 

 Livr. 55, 56, ScHREB. Sdugth. Tab. 317 B, Diet. univ. d'Hist. naf., Mam- 

 mif. PI. I o, fig. 1 ; striped white and black like the zebra, but with white 

 legs ; Burchell has described this new species as the zebra, Travels in the 

 interior of Southern Africa, London, 1822, I. p. 139. The prohfic copula- 

 tion of the zebra with the ass {Ann. du Mus. Vil. p. 245, ix. p. 223) and 

 with the horse (ibid. XI. pp. 237 — 240) has been observed. On fossil horses 

 (Equus fossilis said Equus primigenius), compare Meter, Nov. Act. Acad. 

 Cu's. Leap. Car. xvi. p. 423 sqq. 



Plicalanx III. Artiodactyla OwEN. Ungulates with number 



of toes even. 



In the even-toed ungulates the number of the dorso-lumbar 



vertebrae is constant (19) in all the species. The femur has not a 



third trochanter. The fore part of the astragalus is divided into 



two equal or subequal faQettes. The digit answering to the third 



in the pentadactylous foot is not symmetrical, but forms with that 



answering to the fourth a symmetrical pair. When there are horns, 



they are never developed singly, but are placed on each side of the 



median line in one pair or two. The crowns of the premolars are 



smaller and less complex than those of the true molars. The 



stomach is complex, the ccecum small, the colon spirally folded. 



From Owen On the characters, &c., Proceed, of Linn. Soc. 11. No. 5. 



pp. 28, 29. 



p /» 1 1 



Anoplotherium Cuv. Fossil genus. Incisors - — ~ , canines -| — - 



7 — 7 . 



included, not longer than incisors, molars _ — = , all contiguous. 



All the species are found in the older tertiary strata. The Anoplofherina 

 were divided by CuviER into three genera, viz. Dichobune, Xiphodon and 

 Anoplotherium in stricter sense. Comp. Ann. du Mus. in. et ix., Rech. s. 

 les Osseni. foss. in. Through the labours of later observers allied genera 

 have bejn added to these, on which consult Pictet. 



Family XV. Suina. 



Sus L. Incisors various in number, in the lower jaw mostly 



six, the upper sometimes none, in a few the lower deciduous also ; 



3—3 7—7 

 canines in both jaws distinct, large ; molars ^ — o ~ YZTn ' ^^^^ 



with hoofs insistent, tetradactylous, posterior sometimes tridacty- 

 lous. Nose with snout truncate, mobile, prominent. Tail short or 

 a tubercle in place of tail. 



