EXPRESSIONT BT MEASUREMENTS. 301 



importance to be reproduced, apart from other measurements necessary 

 to determine their relative value in reference to the whole dimensions 

 of the head. But Dr. Adam has aimed, in Xos. 25, 26, at indicating 

 the position of the zygomata, by ascertaining the place of each in relation 

 to the stylo-mastoid foramen on the same side of the cranium. Those 

 measurements are accordingly included in the following tables. In 

 them, as in others of the measurements, the t-a^o columns represent the 

 proportions of corresponding features on the two sides of the crania; 

 and in so far as they differ, they indicate unsymmetrical development- 

 This is proved to be the case in the majority of crania subjected to the 

 test ; and confirms the opinion I have already deduced from extensive 

 observations, that a perfectly symmetrical human liead, in which the 

 one hemisphere is the exact counterpart, or reverse of the other, is a 

 rare exception, rather than the rule. 



Reference to the details of Dr. Adam's system of measurements, as 

 given on previous pages, with their corresponding numbers, will enable 

 the reader to follow him in the few results selected here in their relation 

 to the general system embraced in his comprehensive series. I have 

 retained the order in which he has placed the crania, irrespective of 

 their numbers ; and also the spaces that occur in his tables. Possibly 

 Parisian Anthropologists may be able, by reference to the originals, to 

 perceive some reason for the subdivisions of the male and female groups, 

 as indicated by such interruption of the continuity of the columns of 

 figures. I have assumed the second group to be female crania, for 

 reasons already assigned; and have added to each table the mean results 

 and also the total mean of the two combined. 



The measurements selected are : 7. From the inial margin of the 

 foramen spinale to the coronal point of the occipital bone. 8. From 

 the same to the meeting of the coronal and sagittal sutures. 11. From 

 the glabellar margin of foramen spinale to the coronal point of the 

 occipital bone. 13. From the same to the meeting of the coronal and 

 sagittal sutures. 18. From the same to the inial sinuous margins of 

 palatal bones. 25. From glabellar surface of right zygomatic enclosure 

 to inial surface of right stylo-mastoid foramen. 26. From left do. to 

 left do. 62. Distance betv/een glabellar and inial margins of foramen 

 spinale. 63. Distance between lateral margins of do. 



