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FASCICULI MALJTENSES 
The sacral index, both measurements being taken with the callipers, has a mean 
of 98, the extremes being 96*1 and ioo, while if the length is measured along 
the curve with a tape, the variation is practically the same, the extremes being 
90*0 and 94*2, and the mean is 92*3. 
The mean of the four female pelves is just mesatipellic, being 90*7, while 
the extremes run neither so high nor so low as in the other sex, being 85'9 
and 94*7. The mean breadth-height index is also lower than in the case of 
the male specimens ; for it is only 75*4, while the extremes are 68*7 and 79‘4. 
The former index belongs to the female specimen from Ban Sai Kau, 
which corresponds in several particulars with the male pelvis from the same 
locality, especially in having the alae less vertical than the other specimens of 
the same sex. The sub-pubic angle in this female individual, however, does 
not resemble that of the male quite so closely as the measurement, taken with 
Garson’s goniometer, would seem to indicate, for its comparative lowness is 
due partly to a distinct inward recurvature of the inferior rami which prevents 
the true angle being registered, though in any case it would be low, 
In one pelvis of each sex, namely in Nos, 28 and 25, there are only four 
vertebrae included in the sacrum, and only two take part in the articulation of 
the pelvis. This reduction in the number of the bones anchylosed together is 
not accompanied by any great reduction in the length of the sacrum, the 
individual vertebrae having become correspondingly long; it is due to the 
inclusion of the first sacral vertebra in the lumbar series, not to the separation 
of the fifth and its inclusion in the coccyx. The lateral masses appear to have 
been developed in each case in the vertebra which was morphologically the 
first of the sacral series, and to have articulated on both sides with the lateral 
masses of the bone which was, from the same point of view, the second of the 
series. Unfortunately, the lumbar vertebrae have not been preserved in either 
specimen. 
In the pelvis of No. 27 there is considerable lateral asymmetry, the sacrum 
being twisted forward on the right side, and the rest of the pelvis having been 
distorted in a corresponding manner. The fifth sacral vertebra of this 
specimen has been broken after death, so that the sacral index cannot be given. 
