44 EXPRESSION. 



localization of mental functions in different parts 

 of the cerebral hemispheres, so fashionable with 

 so-called "medical psychologists," have no sup- 

 port from the facts of comparative anatomy, 

 pathology, and experiment, all of which show that 

 the hemispheres have a function common to the 

 mass of their grey matter, so far as thought is con- 

 cerned. Therefore, it would appear that differences 

 of shape of head, not involving differences of cranial 

 capacity, when they indicate differences of mental 

 character, have a purely physiognomic value per- 

 fectly similar to that of differences of features of 

 the face. We may even go further, and admit 

 that it is probable that many of the statements 

 of the followers of Gall have a large amount of 

 physiognomic truth although their theory is utterly 

 wrong. 



These remarks are, I think, sufficient to illustrate 

 that in the expressiveness of permanent forms of 

 the body a class of phenomena exists, not to be 

 explained by reference to the " three principles " 

 which appear to Mr. Darwin " to account for most 

 of the expressions and gestures involuntarily used 

 by man and the lower animals under the influence 

 of various emotions and sensations," viz. : " Ser- 

 viceable associated habits," " the principle of anti- 

 thesis," and " the principle of actions due to the 



