M. L. TiLDESLEY 
251 
it is seen at once that much higher orders of racial resemblance are reached. The 
following table presents the closest results on the whole that have yet been 
obtained: 
Race 
Sex 
No. of 
characters 
C.R,L. 
Probable 
error 
Burmese A and Malayans 
30 
2-69 
±•09 
$ 
30 
1-71 
±•09 
Burmese A and Chinese 
c? 
30 
6-38 
±■09 
? 
30 
2-66 
±•09 
Burmese B and Malayans 
<? 
30 
2-35 
±•09 
? 
30 
4-47 
±•09 
Burmese B and Chinese 
(? 
30 
016 
±•09 
? 
30 
0-53 
±•09 
Burmese C and Malayans 
(? 
30 
003 
±•09 
? 
30 
2-39 
±•09 
Burmese C and Chinese 
(? 
30 
0-29 
±•09 
0 
30 
1-54 
±•09 
Here the main results are at once apparent. Burmese A are closer for both 
sexes to the Malayans than to the Chinese. Burmese C are closer to the Chinese 
than to the Malayans. And again we find Burmese B (Hybrids) closer to both 
Malayans and Chinese than either of the purer types is. Their greater resemblance 
to both prototypes emphasises the probabiUty that they are hybrids: it is a case of 
throwing back after mixture. 
It seems reasonable accordingly to conclude as follows : 
1. The Burmese population in the neighbourhood of Moulmein consists cf at 
least two distinct races and a probable hybrid race. 
2. One of these races, the pure Burman, is more closely allied to the Malayan 
than to the Chinese. 
3. The second of these, probably the Karen, is more closely allied to the Chinese 
than to the Malayan; and as the Chinese is considerably closer to the Caucasian 
than is the Malayan, this section of the population, although quite distinct from 
the Caucasian, is somewhat closer to that type than the Burman proper. 
4. The group we have spoken of as hybrid is closer to both Malayan and Chinese 
than either purer element of the population is to Malayan or Chinese. This is a not 
improbable result of hybridisation. 
I have to thank Miss Noel Karn of the Biometric Laboratory for her help in 
working out the troublesome calculations on which these conclusions are based. 
13. The Asymmetry of the Skull. 
The fact of cranial asymmetry is of course a commonplace to anyone who has 
handled skulls, and reference has already been made* to the pitfalls it prepares if 
we assume that the "horizontal plane" as determined by certain features of the 
skull will, in the individual, be perpendicular to the "sagittal plane" as determined 
by others, and both of them perpendicular to the "vertical plane." 
* See p. 202. 
