32 



Transactions. — Zoology. 



Ophryo-spino-auricular Angle. 



The range of variation is 10. 



The projection of the nasal portion of the face, as shown by 

 this angle, is greater in the Moriori than in the Maori skulls. 



Palato-maxillary Index. 



The average of each group is brachyuranic. 



The range of variation is 22-6. 



All the skulls with the exception of four are brachyuranic. 

 The four exceptions are mesuranic. Expressing this in per- 

 centage form, 89-7 per cent, belong to the former, 10-3 per 

 cent, to the latter group. 



A palato-maxillary index is not given in the catalogue of 

 the College of Surgeons' Museum, nor the measurements by 

 which it is calculated. I cannot therefore compare my skulls 

 with those in that museum in this respect. Those measured 

 by Professor Turner seem to have had narrower palates than 

 those included in my table, as their average index is only 113. 

 His range of variation, between 120 and 107, differs also con- 

 siderably from mine. Combining his results with mine, we 

 get a general average of 119*5 for 47 skulls. 



The ividth of the face compared with that of the anterior 

 2}art of the brain-case is great. In every adult skull, whether 

 male or female, the zygomatic arches are visible from above. 

 In eight, the arches, though visible, do not show their open- 

 ing, but in the other thirty-four they project freely beyond the 

 part of the brain-case above them. The onaximnm transverse 

 diameter of the brain-case is, however, exceeded by the bizy- 

 gomatic in only six skulls, while it is the longer of the two in 

 thirty-one. In two these diameters are equal. This propor- 

 tion is much the same as that noted in connection with the 

 Maori skulls. 



Basi-nasal Length or Cranio-facial Axis. — In thirty-two 



