94 
THE VOYAGE OF H.M.S. CHALLENGER. 
and the mean length of the radius was 233, which gave a radio-humeral index 74"2. It 
should be stated, however, that the specimens examined by Tiingel were not such 
as to furnish very accurately the proportion of the radius to the humerus, for though 
thirteen humeri were present there were only four radii, and it was not certain to 
which humeri they corresponded. 
Two Tasmanian men measured by Topinard had a mean index of 787, whilst in two 
women the index was 78*6 ; in one Tasmanian woman measured by Barnard Davis the 
index was 80, whilst three Tasmanian men had a mean index 81 ; the average of the 
eight specimens being 79*6. 
The radio-humeral index in my male Bushman was 76, and in a Bushman measured 
by G. Fritsch it was 74*5. In two Bush women measured by M. Topinard the mean 
index was 73 '9, and in one measured by G. Fritsch it was only 68. From Professor 
Humphry's measurements of three Bushmen I have calculated an index 76 '8. The 
mean of eight skeletons of both sexes was 73 '8. The mean index in four male Kaffirs 
measured by G. Fritsch was 78 '7, the range of variation in these skeletons being 
from 74'5 to 81 ; in a Hottentot woman examined by the same author the index 
was 71. 
The mean radio-humeral index in my three Negros was 78 '5, the range being from 
77 to 80"5 ; the mean of my two Negresses was 76. From Professor Humphry's 
measurements of twenty-five Negros, probably skeletons of both sexes, an average 
index of 77 "7 can be calculated. M. Broca obtained 79*4 as the mean index of fifteen 
skeletons, nine men and six women. M. Hamy states that the twenty-five skeletons 
which he measured gave a mean index 78*2. M. Topinard gives the mean of thirty-two 
Negros as 79, and of ten Negresses as 78 '3. The mean of two Negros in the Blumen- 
bach collection measured by Spengel was 82"8 ; and the Balumba Negro in the Barnard 
Davis collection had an index 85*7. 
The mean index of my three Andaman Islanders, in which the bones of the forearm 
were preserved and fully ossified, was 8r2; in one Andaman woman measured by 
M. Topinard it was 81*7 ; and in twenty-nine skeletons of Andaman Islanders, measured by 
Professor Flower, this index was 80*6, being 81*5 for the men and 79"7 for the women. 
In one of the two Negrito women measured by Meyer and Tiingel the radio-humeral 
index was 85, in the other 86 ; in the woman of the Aeta tribe, measured by Hamy, this 
index w^as 80 ; the mean of the three specimens was therefore 8 3 "7. 
In my two male Hindoos the mean radio-humeral index was 7 8 "9, and in the female 
it was 817. M. Topinard gives 77*2 as the mean of four Hindoo men, and 75 as the 
mean of three Hindoo women. The mean index in my male Sikh was 75, in Barnard 
Davis's " Bariam Singh " it was 76, and in his Bhutea skeleton it was 77. 
In my Chinese skeleton the radio-humeral index was 76 ; in a Chinaman measured 
by Meyer and Tiingel it was 80 "5 ; in five Chinese and Annamite men measured by 
