Kathleen V. Ryley and Julia Bell 
437 
There is a somewhat noteworthy difference between male and female, but a 
still more remarkable feature of the results is that for the whole eleven characters 
discussed the male is more variable and in some cases no less than twice as 
variable as the female. Such exaggerated differences in variation in the sexes 
oo 
are so unusual, especially in primitive races, that we believe that the noteworthy 
cranial characters of this race, in which " maleness " seems almost a racial character, 
may have led to a far too stringent selection of female crania. Thus on the 
present sexing the female coefficient of variation of the mesodacryal subtense is 
8'0, of the mesodacryal index ct, 8'0, and of the simotic index 14'4, — all values 
much below any reached for females of the human races given in Table XIV. 
We consider it better to postpone publication of the Moriori results, until a 
fuller study has been made of all the craniological characters of the Royal College 
series, which we hope may soon be undertaken. 
Tables A — D give the measurements made for the apes only. The tape 
measurements of the mesodacryal arc scarcely ever permitted of the determination 
to tenths of a millimetre, and this makes the tenths in the mesodacryal chord of 
small value, when we are determining the arcual index j3. In the tables doubt 
as to a value is only expressed in the columns of the absolute measurements and 
not repeated in the index columns deduced from these absolute measurements. 
Of course the index values have no more weight than the data from which they 
are deduced. 
Note. The Editor is responsible for the terminology used in this paper. He 
fully admits its barbarism. But no English form for the Greek adjective exists, 
and when a distinguished classical scholar fails to find one, science must take the 
matter into its own hands, and adjectives in -otic seem the only possibility. 
Simotic has practically Greek sanction ; the pathologists have already adopted 
stenotic ; thus the step to mesotic was not a very great one, and it is shorter 
than mesomorphic or mesorhinal, — were indeed compounds in rhinal not already 
allocated. 
Biometrika ix 
50 
