194 I. W. BLACKBURN 



of the median anterior cerebral artery are frequent among the 

 insane. 



4. That in keeping with other anomalies of the brain among the 

 insane it is probable that many of these variations are in the direc- 

 tion of reversion to the primitive type, and that it is reasonable 

 that the frequently found arteria termatica is one of these rever- 

 sions or survivals such as are not uncommon in other organs. 



Accepted by the Wtstar Institute of Anatomy and Biology, March 24, 1010. Printed July 7, 1910. 



