MAMMALIA. 641 



Dicotyles Cuv. Hind feet tridactylous, the outer accessory hoof 



4. 

 being deficient. Tubercle in the place of tail. Incisors ^ , canines 



/ / o 



not exsert, the upper directed downwards, molars ^ , tuberculate. 



Sp. Sus torquatus WAGN., Dicotyles torquatus Cuv., DEBIT., BUFF. Hist. nat. 

 x. 3, 4, SCHREB. Sdugth. Tab. 325 (figure copied from BUFFON'S work), 

 Tab. 325 A, Diet. univ. d'Hist. not., Mamtn. PL 10 B, fig. i ; South 

 America and the most southern parts of the United States ; Sus labiatus, 

 Dicotyles labiatus Cuv., Dicotyles albirostrip ILLIG., SCHREB. Sdugik. Tab. 

 325 B, MAXIM. Abb. zur Naturgesch. Bras. Lief. 15, GUERIN Iconogr., 

 Mammif. PL 38, fig. i ; South America. Both of these small species of 

 hog live in the forests of the New World, and are, equally with the common 

 hog introduced by Europeans, called by the Guaranis, Tayazou; hence the 

 name of Sus Tajacu, by which LINN.&US named, principally indeed, the 

 first species, but also confounded the two. See on the anatomy TYSON 

 Phil. Trans. 1683, p. 359, DAUBENTON in BUFFON; on the dorsal gland in 

 particular SEIFERT (under the presidence of EUDOLPHI) Spicilegia ode- 

 nologica, Berolini, 1823, p. 10, Tab. n., and J. MUELLER De glandular, 

 secern, structura, p. 41, Tab. n. fig. 2. 



Pliacochcerus F. Cuv. All the feet tetradactylous. Tail short. 

 A fleshy wart under each eye. Molar teeth various in number 



according to age, = Q~^ r;> tne ^ as * verv * on & composed of 

 cylindrical tubes surrounded by enamel, closely conjoined; canines 



o 



large, exsert, directed upwards and outwards. Incisors either ^ , 

 or the lower only four, deciduous. 



Sp. Sus cethiopicus L. (Syst. nat. ed. 12, in. p. 223), Phacochcerus Pattasii 

 V. D. HOEV., OWEN ; VOSMAER Beschr. van het AfrikaanscJi breedsnuitig 

 varken, Amsterd. 1766, 4to (with a col. fig.), PALL. Misc. Zool. Tab. n. 

 Spic. Zool. n. Tab. i ; without persistent incisors ; at the Cape of Good 

 Hope; the ^Ethiopian Wart-hog. SusJBliani, Sus Africanus GM., Phacho- 

 ch&rus jfcliani, RUEPPELL Ail. zu der Seise im nordl. Africa, 1826, Tab. 

 25, 26, GUERIN Iconogr., Mammif. PL 38, fig. i ; with persistent incisors ; 

 in Abyssinia, at the coast of Guinea and in Mosambique; the African 

 Wart-hog. It was incorrectly supposed that the molars succeed each other 

 here as in the elephant. There are originally three milk-molars and three 

 permanent molars; of the first two molars that replace the milk-teeth 

 (prcemolars) the last persists, and of the unchangeable hind molars the 

 hindmost alone remains. OWEN has convincingly explained the dentition 

 of these animals with his usual profundity l . 



1 According to CuviER (Rech. s. les Ossem. foss, n. i, p. 124, R. Ani. i. p. 245) 

 the two middle metacarpal and metatarsal bones in Dicotyles coalesce as in ruminants ; 

 VOL. II. 41 



