316 Proceedings of the Royal Irish Academy. 



higher mid-parietal altitiidinal index for the male than for the female 

 calyaria.^ 



The sTToUen character of the mastoid process appears to be a 

 sexual character in these calvaria. 



A^'ALTSis OF THE F£:m:axe Caltaeia. 



The eight female calvaria fall into two groups. A and B, with a 

 cephalic index of 77'4, are more distinctly mesaticephalic than any 

 of the male calvaria. The remaining half dozen are all dolichocephalic, 

 ranging from 72' 5 to 73 "9, the average being 73-0. 



The calvaria I, K, L, IT, have an average altitudinal index of 70-1, 

 and are therefore distinctly tapeinocephalic, whereas A is metiio- 

 cephalic, with an index of 73-4. 



Measured with millet seed the average cerebral capacity is 1350- 

 I was unable to employ shot in measuring the cerebral capacity 

 owing to the fragile character of the calvaria. The standard cranium 

 in the laboratoiy has been measured by Dr. Browne, with the 

 following results : — the water capacity is 1410, the millet seed 

 capacity is 1445, and the shot capacity is 1455-1460. 



In order to form a means of comparison between the cranial 

 height of the living subject and the height of the cranium, I have 

 given auriculo -vertical radii. These measurements were taken with 

 the calvaria held in a position similar to that in which the heads of 

 the subjects are placed, and the height is similarly the vertical radius 

 above the external auditory meatus. 



1 Sir "William Turner, in Ms "Challenger" " Eeport on the Human Skele- 

 tons: I. — The Crania," says, p. 117: — "As regards to sexes, my measurements 

 generally confirm those made by preceding craniologists, who give to the female- 

 skull a less absolute and relative height than to the male." 



