522 C. JUDSON HERRICK 



EXPLANATION OF FIGURES 



40. A diagrammatic cross section of the cerebral hemisphere of the frog taken 

 midway between the lamina terminalis and the olfactorj' bulb. It illustiates the 

 four parts of the hemisphere, separated by the dorsal and ventral angles and the 

 median and lateral limiting zones; also the dorsal and ventral association tracts 

 and some of the tracts which pass across the limiting zones. 



41. Diagram of a horizontal section of the brain of the frog to illustrate the con- 

 nections of the bulbulus accessorius, ventro-lateral olfactory tract and so-called 

 corpus striatum. 



