30 



Transactions. —Zoology. 



them, the asterionic diameter exceeds the Stephanie nineteen 

 times ; the reverse condition occurs eighteen times ; and in 

 three skulls the two diameters are equal. 



Though in the majority of cases the Stephanie diameter is 

 the maximum frontal, yet in fifteen of the skulls examined the 

 greatest frontal width lies a little below the stephanion. 



Index of Fobamen Magnum. 



Both Sexes. 



The range of variation is here 23-5. 

 Orbital Index. 



The male average is high up in the mesoseme division ; 

 the female is low in the megaseme ; and the combined average 

 is almost in the latter group. 



The range of variation is 24' 1. 



Of the forty-two skulls measured, twenty, or 4:7*6 percent., 

 are megaseme; eighteen, or 42-9 per cent., are mesoseme; 

 and four, or 9-5 per cent, are microseme. A much larger 

 proportion (32'4: per cent.) of the Maori skulls examined 

 were noted as microseme, wliile the percentage of megaseme 

 Maori skulls was only 25. 



The average female index is seen to be higher than the 

 male. This is not the case with the Maoris measured by me. 



The average index of the skulls in the Paris Museum is 

 96, while that of Professor Flower's series is 93-7, both con- 

 siderably higher than what I give above. Professor Turner's 

 have 88 as their average. 



Combining their results with mine, we get, from a series of 

 sixty-three skulls, an average orbital index of 90-1, a little 

 higher than what I get from my own measurements, which 

 brings the Moriori into the megaseme group. 



The average interorbital distance in my skulls is between 

 20mm. and 21mm. 



