Malaysian Bearded Pigs. 
By C. Boden Kloss, f.z.s. 
I have for examination a small series of Malaysian bearded 
pigs from the Bomean-Sumatran area : those from Borneo are 
Sus bnrbatus : pigs from Sumatra and Sumatran islands have been 
named, and determined as, Sus oi 1 : the latter series is not homo- 
genous and it is open to anyone to say that the island animals are 
of the Bornean form — but a topo-type of Sus oi is still more like 
the latter than are the animals from the islets. 
When Miller wrote his “ Xotes on Malayan Pigs ” 2 he defined 
Sus barbatus of Borneo (after examining 27 skulls of adults) as 
having “ the posterior molar, both above and below long, the upper 
tooth containing a compressed anterior median ridge, a middle 
median ridge, and a large terminal median heel in addition to two 
well-developed bicusped cross ridges, the lower tooth containing 
three large bicusped cross ridges and three smaller median ridges, 
the last of which forms the terminal heel.” 
Of Sus oi he wrote in the same article (nine specimens ex- 
amined from E. Sumatra, Banka and Ivundur Id: but only two 
adults with the last lower molar in good condition) “last molar 
both above and below smaller than in the Bornean animal, the 
upper tooth retaining all its elements, but with its posterior portion 
much narrowed, the lower tooth lacking the terminal heel, but with 
the third transverse ridge reduced to a terete heel-like remnant. 
“ This species is distinguishable from Sus barbatus chiefly by 
the reduced size and complexity of the posterior lower molar, as 
shown by the type and by one of Doctor Volz’s Palembang speci- 
mens, the only adults yet known with this tooth in good condition. 
No tendency toward a similar reduction could be detected in any 
of the twenty-seven adults of Sus barbatus that I have examined. 
It is very probable that, as Doctor Jentink states, the skull is more 
elongated than in the Bornean animal.” 
In his key he summarises the differences as follows : — 
“ Third lower 'molar with three cross ridges and a terminal 
heel.... Sus barbatus. 
1 Miller, Proc. Biol. Soc. Washington, XV, 1902, pp. 51-2. 
2 Proc. U. S. Nat. Mus. XXX, 1906, pp. 737-758, pis. XXXIX-LXTV. 
Jour. Straits Branch R. A. Soc., No. 83, 1921. 
