240 Variation and Correlation of the Hainan Skull 
Finally, looking at the correlation between the indices and the absolute lengths 
which they involve, we observe that the following statements hold with regard to 
all three series, English, French and Naqadas. 
(c) Dolichocephaly and chamaecephaly are associated with macrocranial 
characters. 
{d) Brachycephaly is associated with platycranial characters. 
(e) Hypsicephaly is associated with hypsicranial characters. 
In (c), {d) and {e), the association is due entirely to the spurious correlation. 
The technical descriptive terms are used above in an intra-racial sense. As 
usual, dolichocephalic, chamaece^jhalic, stenoceplialic denote crania having their 
BjL, HjL and BjH indices below, brachycephalic, hypsicephalic, platycephalic 
denote crania having these indices above, the racial mean. Brachycranial, steno- 
cranial and chamaecranial are used to denote individuals whose L, B and H are 
below, macrocranial, platycranial and hypsicranial denote individuals in which 
these measurements are above, the racial mean*. These terms cannot be used in 
an inter-racial sense until we have determined inter-racial means, that is, means of 
racial means, and little progress has as yet been made with such determinations. 
The only instances of which I am aware are to be found in Biometrika, Vol. ll. 
p. 353, where Dr Alice Lee has found a scientific classification of cephalic index 
and nasal index in living races, based on the means of 51 races. 
(12) General Conclusions. 
I look upon this memoir as in the first place contributing new material in a 
reduced form to the collection of biometric data for man which is slowly being 
formed. Only when that collection is far more complete will it be possible to 
state general conclusions applying to the whole field of craniology. I venture 
to think that the chief aim of craniologists at present should be to table the 
means, standard deviations and correlations of further long series of skulls. When 
such tables have been formed for 40 or 50 long series we shall have far more 
light not only on intra-racial but on inter-racial problems. 
Admitting that this is primarily a contribution to such a biometric descrip- 
tion of mankind, we are still I think justified in drawing one or two general 
conclusions, partly with reference to the English cranium itself and partly with 
reference to its relation to other groups or series. 
In the first place it will be noted that our material comes from a single centre, 
and it may be said not to be a fair sample of the English skull in general. The 
only reply that can be made to this is that whether judged by the biometric con- 
stants or by a careful appreciation of the material as a whole, the series appears 
to be homogeneous, and very different from German, French or other continental 
* See Schmidt, Anthropologische Methoden, p. 296. 
