30? 



A. Summits of upper canines of males completely 



abraded by attrition of lower pair. 



a. No osseous tuberosities on or above sheaths 



of upper canines ; ears not distinctly tufted Sus. 



b. Two pairs of osseous tuberosities on and 



above sheaths of upper canines Potamochcerus. 



B. A facet worn on lower surface of upper canines 



by attrition of lower pair, leaving the summits 

 more or less nearly entire. 



a. Last molar in each jaw brachyodont and 



normal Hylochosrus. 



b. Last molar in each jaw hypsodont and 



abnormally complex Phacochoerus. 



c. No abrasion of upper canines (which are very long 



and slender) by lower pair Babirussa. 



I. Genus SUS. 



Sus, Linn. Syst. Nat. ed. 10, vol. i, p. 49, 1758, ed. 12, vol. 1, p. 102, 



1766 ; Blasius, Sdugeth. Deutschlands, p. 508, 1857 ; Gray, Cat. 



Carnivora, etc. Brit. Mas. p. 326, 1869 ; Stehlin, Abh. schweiz. 



pal. Ges. vol. xxvi, passim, 1899 ; Flower and Lydekker, Study 



of Mammals, p. 281, 1891 ; Miller, Cat. Mamm. West. Europe, 



p. 956, 1912. 

 Aper, Pallas, Misc. Zool. p. 16, 1766 ; Bafinesque, Analyse de Nature, 



p. 56, 1815. 

 Centuriosus, Gray, Proc. Zool. Soc. 1862, p. 17, 1868, p. 40, Cat. 



Carnivora, etc. Brit. Mus. p. 347, 1869, Hand-List Thick- 

 skinned Mamm. Brit. Mus. p. 66, 1873. 

 Scrofa, Gray, Proc. Zool. Soc. 1868, p. 38, Cat. Carnivora, etc. Brit. 



Mus. p. 345, 1869. 

 Euhys, Gray, Cat. Carnivora, etc. Brit. Mus. p. 339, 1869, A nn. Mag. 



Nat. Hist. ser. 4, vol. x, p. 435, 1873, Hand-List Thick-skinned 



Mamm. Brit. Mus. p. 57, 1873. 

 Aulacochcerus, Gray, Ann. Mag. Nat. Hist. ser. 4, vol. xi, p. 435, 



1873, Hand-List Thick-skinned Mamm. Brit. Mus. p. 58, 1873. 

 Dasychcerus, Gray, Ann. Mag. Nat. Hist. ser. 4, vol. xi, p. 435, 1873, 



Hand-List Thick-skinned Mamm. Brit. Mus. p. 58, 1873. 



Dentition : i. f , c. -{-, p. J, m. f = 44 ; outer upper incisors 

 and first upper and lower premolars not infrequently 

 wanting in adults ; summits of upper canines completely 

 abraded by wearing against the lower pair ; molars brachyo- 

 dont and of the normal neobunodont type ; skull long, high, 

 and narrow, without osseous tuberosities above or on sheaths 

 of upper canines ; ears not distinctly tufted. Young usually 

 striped longitudinally. 



The distribution is co-extensive with that of the sub- 



x 2 



