BY ARTHUR H. CLARKE, M.R.C.S. 



INDEX OF FORAMEN MAGNUM. 



Ill 



The average index is, therefore, 82.1. 



ORBITAL INDEX. 



Average. Minimum. Maximum. Class. 

 95-0 917 97-3 Megaseme 



94-9 89-2 94-3 



94-95 89-2 97'3 



94.95 classes this series of skulls as 

 megaseme. 



In eight skulls Flower finds an average of 89.8, placing 

 his specimens in the same class. 



Sex. 

 Male 

 Female 

 Total 



This 



No. 

 4 

 4 



average 



NASAL INDEX. 



Sex. No. Average. Minimum. Maximum. Class. 

 Male 4 52-7 47-1 58-1 Mesorhine 



Female 4 51*7 ol'l 52-3 



Total 8 52-2 47-1 58'1 „ 



This average of 52.2 classes these skulls as meso-rhine. 



Flower, in eight crania, finds a higher average of 53.9, 

 classing his specimens as platyrhine. 



GNATHIC 



Sex. No. Average. Minimum. 

 Male 4 105-6 102-0 



Female 2 10 ri 101*0 



Total 6 104-1 101-0 



The Females are mesognathous, but the males progna- 

 thous. The average index in our specimens, 104.1, is 

 lower than that in six specimens measured by Flower, in 

 which it is 105.0. 



Maximum. Class. 

 109-6 Prognathous 

 lOl'l Mesognathous 

 109-6 Prognathous 



