EXPLANATION OF PLATES 



The plates contain figures representing outline drawings of transverse sections 

 taken from the sixth cervical, eighth thoracic, and third lumbar segments of the 

 spinal cords of the twenty-four mammals named. The drawings were traced from 

 projections of the respective section with the Edinger Drawing Apparatus set 

 for a magnification of eight diameters. They are here reduced one-half and 

 thus are magnified four times. The letter C indicates the cervical region, Th, 

 the thoracic, and L, the lumbar; F.c.i., fasciculus cerebro-spinalis internus. 



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