130 Journal of Comparative Neurology. 



When 5 groups of persons are recognized the combina- 

 tions are as follows : 



A. In 8 moral and educated persons, combination I, 

 62.5; II, 25 ; III, 12.5. 



B. In 23 ignorant or unknown, I, 56.5; II, 34.8; III, 8.7. 



C. In 20 insane, 1,40; II, 35; III, 20; IV, 5. 



D. In 4 murderers, I, o ; II, 75 , III, 25. 



E. In 3 negroes, I, 33 ; II, Gj . 



So far as these 58 individuals are concerned, the most com- 

 mon combination, viz., left continuity and right separation, is 

 decidedly the rule with the moral and educated, less frequent 

 with the ignorant and unknown, the insane and negroes, and 

 does not occur at all in the murderers. The only instance of 

 the reverse combination (left separation and right continuity) is 

 an insane Swiss woman. The only two known to be left-handed 

 presented the more frequent combination I. 



These statistics suggest many special queries and problems, 

 some of which were briefly indicated. But the speaker wished 

 this to be regarded as a preliminary communication and asked 

 the cooperation of other members in the effort to obtain satis- 

 factory records of larger numbers, particularly of brains of well- 

 born, moral and educated persons. For this purpose a blank 

 form was outlined and will be sent upon application. 



