INTRODUCTORY NOTE 



THE first part of this work includes a schematic outhne of the 

 organization of the amphibian brain and discussion of some 

 morphological and physiological principles suggested by this inquiry. 

 In Part II, evidence is presented in sufficient detail to document the 

 conclusions and principles summarized in Part I. This material is 

 arranged by topographic regions, as these are listed in chapter iv. 

 These descriptions are supplementary to those in Part I, and each 

 topic should be read in connection with the corresponding passages 

 of the preceding text. 



