Scott. — Osteology of the Maori and Moriori. 49 



Comparing these figures with the trcansverse diameter of 

 the pelvic brim, we find that in the male pelvis the sacral 

 width is 97 per cent, of the brim width, while in the female it 

 is 94 per cent., showing that the cm'vature of the back part of 

 the iliopectineal lines is more pronomiced in the female than 

 in the male. 



It will also be seen that the average degree of cm-- 

 vatm-e of the sacrum, as got by comparing the length 

 with the arc of the bone, is practically the same in both 

 sexes. 



Though the female index is distinctly higher than the 

 male, it is worth noting that the highest and lowest indices 

 both belong to female sacra. 



The length of the sacrum in Professor Turner's two male 

 Maoris is lOlmm. and 120mm., while the breadth is 97mm. 

 and 115mm. The sacral index is in each case, therefore, 96. 

 If we include these with my set of males we get an average 

 for that sex of 106-5, nearly eleven less than the average 

 female index. 



According to M. Verneau's measurements, the average 

 length of the European sacrum is 105mm. in males, and 

 101mm. in females, while the width in the male is 118mm. 

 and in the female 116 ; though Dr. Garson gives this latter 

 average as 118-3. The Maori sacrum, then, so far as my 

 measurements go, is in both sexes of almost the same length 

 as the Em-opean ; but it is somewhat narrower in the male 

 and broader in the female than the European average for each 

 sex. 



Looking to the proportion between these two measure- 

 ments, the index, we see that the Maori sacrum is in both 

 sexes iDroader than it is long, and, in consequence, belongs to 

 the platyhieric group (platyhieric, index over 100 ; dolicho- 

 hieric, index under 100)", in common with Europeans, ^'ho 

 male sacra are, however, almost in what Professor Patersonf 

 calls the subplatyhieric division — those with an index between 

 100 and 106, a group containing, amongst others, Andaman 

 Islanders and Negroes. The female sacra have, on the other 

 hand, indices equal to the average of the European female. 

 Only one sacrum is dolichohieric, and that is a female with an 

 index of 99-2. 



As five of my pelves belong to skeletons of which I 

 have also the skulls, I give in the following table some 

 of the more important indices of the two cavities in each 

 body. 



* Professor Sir William Turner: "'Challenger' Eeport " : Human 

 Skeletons. 



t " The Human Sacrum " : Royal Society Proceedings, 1892. 

 4 



