REPORT ON THE BONES OF THE HUMAN SKELETON. 
9 
24. Iliac index is the relation of the height-length to the breadth of the ilium 
i . • -i i n , breadth x 100 
obtained by the tormula rr-' 
J height-length 
25. Breadth of innominate bone is from the postero-superior iliac spine to the top of 
the pubic symphysis. 
26. Length of os pubis is from a point at the bottom of the acetabulum, at the upper 
border of the rough surface opposite the pectineal eminence, to the pubic symphysis. 
27. Pubo-innominate index is the relation of the length of the os pubis to the breadth 
of the innominate bone, and is computed by the formula x . 
1 J innominate breadth 
28. Length of ischium is from the angle formed by the junction of the upper and 
posterior border of the rough area at the bottom of the acetabulum to the most depending 
part of the tuber ischii. 
29. Innominate index . — The height-length of the innominate bone being the same as 
the height of the pelvis (2), the relation of the breadth of the bone to its height is 
1 -t . ,, , breadth x 100 
computed by the formula wEubSSlT 
30. Ischio-innominate index is the relation of the length of the ischium to the height- 
o o 
length of the innominate bone or pelvic height (2), and is computed by the formula 
ischial length x 100 
pelvic height 
31. Length of sacrum is from the middle of the promontory to the middle of the 
antero-inferior border of the fifth sacral vertebra. 
32. Breadth of sacrum is the greatest breadth of the base of the sacrum. 
33. Sacral index is computed by the formula 
breadth x 100 
length 5 
length = 100. 
34. Length of coccyx is the length from the base of the first coccygeal vertebra to 
the tip of the coccyx. 
35. Breadth of coccyx is the greatest breadth of the first coccygeal vertebra. Owing 
to the coccyx being frequently either imperfect or broken in the macerated pelvis, the 
dimensions of this bone could only seldom be taken. A coccygeal index might be com- 
puted by a formula similar to that used in estimating the sacral index. 
Australians. — Table I. Plate I. 
I have examined and measured eight Australian pelves, of which six were adult males, 
one an adult female, and one a young male. They, with one exception, were portions of 
the skeletons to which the skulls described in the First Part of this Report from Queens- 
land, Riverina, Swan Hill b, Table III. ; from Eucla, Perth, Table IV. ; from West Victoria, 
Table V. ; and from near the Murray River, Table VI., belonged. The additional skeleton, 
a male from Manly Cove, New South Wales, I have received from Professor Anderson 
(zool. chall. exp. — part xlvii. — 1886 .) Aaa 2 
