274 S. WALTER RANSON 



Leszlenyi, O. 1912 Vergleichend-anatomische Studie iiber die Lissauersche 

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LissAUER, H. 1885 Beit rag zur pathologischen Anatomic der Tabes dorsalis 

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j\lARGULlf:s, A. 1896 Zur Lehre vom Verlaufe der hinteren Wurzeln beim Men- 

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1912 The structure of the spinal ganglia and of the spinal nerves. Jour. 

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1913 The fasciculus cerebro-spinalis in the albino rat. Am. Jour. 

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Sibelius, C. 1905 Drei Falle von CaudaafTektionen nebst Beitragen zur topo- 



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PLATE 1 



explanation of figure 



The drawings were made with the aid of a camera lucida from pyridine-silver 

 preparations of the spinal cord of the cat. 



1 From the Seventh cervical segment. The substantia grisea presents a dense 

 mass of interlacing fibers. The nerve cells are indicated in solid black. Capping 

 the posterior cornu is the lightly staining substantia gelatinosa. More dorsally 

 is seen the darkly staining tract of Lissauer, h. At n, is seen the obliquely cut 

 medullated fibers of the entering dorsal root in the fasciculus cuneatus. At c, 

 is represented the dorsal spino-cerebellar tract, and at d, the pyramidal tract. 

 The differentiation of the fiber columns of the cord shown in the drawing is due to 

 the varying proportion of non-medullated fibers which they contain. These are 

 most abundant in the tract of Lissauer. The pyramidal tract contains the next 

 greatest number, and the dorsal spino-cerebellar tract the fewest. X 23. 



