MALAYSIAN BEARDED PIGS. 
149 
Recent writers on Bornean pigs have agreed that S. longi- 
rostris, Nehring, is only a synonym of S. barbatus which Miller 
says is a large-toothed animal. Is there another pig in Borneo 
(besides S. barbatus and S. gargantua) : or is the last molar in the 
Bearded Pig as variable as it is in some species of Presbytis — as 
variable as many of the characters of the skull? This latter sup- 
position seems more likely. 
As far as the teeth go T am unable to separate my material 
into two forms but there appear to be other characters by which it 
may be possible to maintain the Sumatran animal as a slightly 
differentiated subspecies. 
As compared with S', b. barbatus it has the muzzle (front of 
pmx to anterior alveolus of canine) longer — and perhaps a little 
broader; the mandibular symphysis longer; the mandible a little 
deeper ; while the profile of the face is perhaps a little more con- 
cave. And though fewer Sumatran than Bornean animals have 
been measured S. b. oi also appears to be a little larger. The 
maximum upper length of skull in the U. S. National Museum 
series is 490 mm. for barbatus (27 specimens) : 505 for oi. Mv 
series shows 480 for barbatus : 520 for oi (from Tanjong Batu). 
What is Sus gargantua Miller’, a name based on a very large 
skull from S. E. Borneo (the type locality of Sus barbatus) ? Its 
molars in, no way differ from those of barbatus and oi, the unique 
skull possessing a posterior lower molar with three bicuspid ridges 
and a terminal heel. 
Its distinctness rests on the size and shape of the skull and 
while, though adult, it is only a young adult yet the upper length 
of the skull measures some 570 mm. (224 in.) against 490 (19'4 
in.) in S. barbatus and 520 (204 in.) in Sus oi. As for the shape 
of the skull it differs from that usual in the others principally in 
having that part of the cranium lying behind the orbits pushed 
backwards and downwards so that it is more prolonged posteriorly 
and not so high there, the bottom of the condyles being scarcely 
above the alveolar line of the cheek teeth; while lines drawn 
through the lower edge of the zygomata and of the alveolus are 
either parallelled or, if produced, meet posteriorly whereas the same 
lines produced in barbatus and oi always seem to meet anteriorly. 
In spite of the skull being larger than the known skulls of 
the others the teeth do not exceed theirs in size. 
If the type of S. gargantua. is not an example of barbatus of 
abnormal shape and size (and there is no reason to believe that it 
is) it must be a distinct species since gargantua and barbatus occur 
side by side. Perhaps marked external differences will later be 
found. 
5 Miller, t. c. p. 743 and plates. 
R. A. Soc., No. 83, 1921. 
