FASCICULI MALATENSES 
101 
has an intermediate character in both, being separated from the mandible 
neither by a definite ridge nor by fossae, and not sloping outwards and down¬ 
wards in any very definite manner ; both specimens are platyrhine, their nasal 
indices being 55*7 and 53 2 ; the nasal spine is very prominent in No. 23. 
The faces give the impression of being flatter than those of the two Malay 
skulls ; the maxillo-facial index of No. 23 is 55, while that of No. 24, in which 
the alveolar point is slightly broken, is approximately 54 ; so that both 
specimens, taking this index, are leptoprosopie. The complete facial index of 
the male specimen, however, is, like that of the two Malays, chamaeoprosopic, 
being only 85*7. 
Norma occipitalis* 
Viewed from behind, both specimens are pentagonal in outline. The 
flatness apparent in No. 23 is probably due to artificial treatment during 
infancy, though the inward slope of the nuchal plate is approximately equal in 
the two skulls and there are no indications of such treatment in No. 24. 
Jaws and Teeth . 
The palates are very much broader and shorter than in the Malay skulls, 
the two palatal indices being both brachyuranic ; they are 126*8 and I23‘i. 
The condition of the body of the lower jaws is similar to that of the specimens 
described above ; but in No. 23 the elevation of the ramus is considerable, 
while in No. 24 the angle which it makes with the body is so open as to be 
quite infantile. 
In the male specimen the condition of the teeth approximates to that in 
the Malay skull from Jambu ; in the upper jaw two third molars are present, 
but they are small and ill-developed, having each two fangs, which are only 
partially separated from one another ; in the lower jaw the wisdom tooth 
is only visible to the right side and has there been so crowded that is has 
grown in sideways, the direction of its growth being midway between the 
vertical and the horizontal. In No. 24 the crowns of the anterior teeth are 
smaller, and the third molar has been allowed to develop on both sides of both 
jaws, being large and well formed in the lower jaw but, apparently, dwarfed 
and peg-like in the upper. 
The male skull, No, 23, is megacephalic, its cubic capacity being 1,475 
c.cm., while the female specimen is microcephalic, having a capacity of 1,325 
c.cm. 
These two skulls from Ban Sat Kau are typically Mongoloid in the 
majority of their characters, showing many resemblances to a series of Siamese 
