STJiD^ 349 



At the present day the genus is restricted to Ethiopian 

 Africa and Madagascar, but Stehlin is of opinion that certain 

 large swine from the lower Pliocene of Attica and India, 

 originally described as Sus erymanthius, S. giganteus, and 

 S. titan, really belong to Potamoclimrus. 



The following is a " key " to the species : — 



A. Coat long, sparse, and more or less dark in 



adult ; dorsal crest long and mainly black ; 



facial tuberosities strongly developed, 

 u. Parietal region of upper surface of skull 

 shorter. 



a'. Muzzle more slender (?) P.la/rvatus. 



V . Muzzle less slender (?) P. cliceropotamus. 



6. Parietal region of upper surface of skull longer P. hassama. 



B. Coat and facial tuberosities as in a ; colour and 



colour-pattern as in B P. intermedius. 



c. Coat shorter, denser, and more or less rufous ; 

 dorsal crest short and white ; facial tuber- 

 osities less developed than in A P. porcus. 



I. POTAMOCHCEEUS LARVATUS. 



Sus larvatus, F. Cuvier, Mem. Mus. Paris, vol. viii, p. 447, pi. xxii, 

 1822. 



Phasooohoerus larvatus, Jardine, Naturalist's Libr., Mamm. vol. v, 

 p. 232, 1836, partim. 



Choiropotamus africanus. Gray, List Mamm. Brit. Mus. p. 185, 1843, 

 partim. 



Potamochoerus africanus, Q^'ay, Proc. Zool. 8oc. 1852, p. 131, 1854, 

 1868, p. 34, Cat. Ca/rnivora, etc. Brit. Mus. p. 341, 1869, Hand- 

 List Thich-shinned Mamm. Brit. Mus. p. 56, 1873, partim. 



Potamochoerus madagasoariensis, Orandidier, Rev. Mag. Zool. 1867, 

 p. 85. 



PotamoohceruB edwardsi, Orandidier, Rev. Mag. Zool. 1867, p. 318 ; 

 Gray, Ann. Mag. Nat. Hist. ser. 4, vol. xv, p. 45, 1875 ; Sclater, 

 Proc. Zool. Soc. 1894, p. 92. 



Potamochoerus larvatus. Major, Proc. Zool. Soc. 1897, p. 363, 

 pis. XXV and xxvi, fig. 2 ; Stehlin, Abh. schweiz. pal. Ges. 

 vol. xxvi, p. 17, pi. X, 1899 ; Bothschild, Powell-Cotton's Abys- 

 sinia, p. 481, 1902, Proc. Zool. Soc. 1906, p. 632; Lonnberg, 

 Arhiv Zool. vol. vii, no. 6, p. 28, 1910. 



Macrocephalus larvatus, Elliot, Cat. Mamm. Field Mus. {Field Mus. 

 Zool. Pub. vol. viii) p. 34, 1907. 



Typical locality Western Madagascar; the range also 

 including the eastern districts of that island. 



Chiefly distinguished from the next, and typical, species 

 by its smaller size, and, it is said, the more slender muzzle. 



