THE FOREBRAIN OF THE GUINEA PIG IN STEREOTAXIC COORDINATES.

A stereotaxic atlas has been prepared of the forebrain of the guinea pig (body weight 700–830 g) using a standard cat-monkey stereotaxic instrument. The coordinates used were the vertical interaural plane (APO) and the horizontal orbital-interaural plane (HO). The atlas consists of transverse sections of the brain taken at 0.5 mm intervals from A5 through A15.