BEHAVIOR AND CNS INTEGRATION 



215 



NS-186 



LOA 



DOTr 



NS-191 



LOA 



DOTr 



cm 



Figure 8 Transverse reconstruction of lesions for subjects NS-186 and NS-191. Sections 

 are ordered rostrocaudally, 2 mm apart, with black areas indicating missing or necrotic 

 tissue and ventricles outlined by solid black lines. Abbreviations are CN, central telen- 

 cephalic nucleus; DOTr, decussation of the optic tract; LOA, lateral olfactory area;TrP, 

 tractus pallii; TTr, thalamotelencephalic tract; SB, area superficialis basalis. 



performances on the BW and HV discrimination tasks. NS-186's rapid learn- 

 ing of the position task is especially inconsistent with this type of explana- 

 tion and also argues against any disorder of short-term memory or reinforce- 

 ment mechanisms, as reported in teleosts with telencephalic lesions (Flood 

 and Overmier 1971, Savage 1968a, 19686, 1969a, 19696). 



Effects of Telencephalic Lesions on Learned Visual Discrimination 

 Habits— The surgically induced impairments in. shark visual discrimination 



