The auditory centre and neural Pathway from peripheral receptor to mesencephalicus in anura amphibia bufo gargarizansand songbird hawfinch were studied compariatively by horseradish peroxidase (HRP) transport method. The result indicated: (1) Auditory centre and pathway in anura amphibia bufo gargarizans: peripheral acoustic nerve fibers project ipsilaterallyto dorsal medullary nucleus (DMN). DMN is the first centre. The DMN projects to superior olivary nucleus (OS). mainly on theopposite side, OS is the se...