168 S. WALTER RANSON 
in the connective tissue from which they are only separated by a 
thin neurilemma. The number of axons medullated and non- 
medullated which can be seen in the Cajal preparation far exceeds 
the number of myelin sheaths demonstrated by the Pal-Weigert 
method. 
In summing up this point it may be said that the small cells 
of the spinal ganglion exceed in number the large cells, that their 
axons are non-medullated and divide after the manner of a T 
or Y into a central and a peripheral fiber. The former runs into 
the spinal cord and the latter can be followed for long distances 
in the spinal nerves, but the ultimate distribution of neither the 
centrally nor peripherally directed branch has yet been deter- 
mined. 
BIBLIOGRAPHY 
Brecscuowsky, M. 1908 Uber den Bau der Spinalganglien unter normalen 
und pathologischen Verhaltnissen. J. f. Psychol. u. Neurol., Leipz., 
Bd. 11, pp. 188-227. 
Casa, S. R. 1905-06 Trab. del Laborat. de Investig. Biol., vol. 4. Ref. Rev. 
Neurol. and Psych., vol. 4, p. 124. 
1907 Die Structur der sensiblen Ganglien des Menschen und der Tiere. 
Anat. Hefte, Zweite Abt., Bd. 16, p. 177. 
Doatet, A. S. 1897 Zur Frage tiber den feineren Bau der Spinalganglien. 
Internat. Monatsschr. fir Anat. u. Physiol., Bd. 14, p. 73. 
1908 Der Bau der Spinalganglien des Menschen und der Siugetiere. 
Jena. 
GauLe and Lewin 1896 Uber die zahlen der Nervenfasern u. Ganglienzellen 
des Kaninchens. Centralbl. f. Physiol., H. 15 u. 16. 
Havat, SHinkrsHt 1902 Number and size of the spinal ganglion cells and dor- 
sal root fibers in the white rat at different ages. Jour. Comp. Neur., 
vol. 12, p. 107. 
HeipENnHAIN, M. 1911 Plasma und Zelle. Jena, 1911. 
Huser, G. Cart 1896 The spinal ganglia of Amphibia. Anat. Anz., Bd. 12, 
p. 4)7. 
Lennosshx, M. v. 1907 Zur Kenntnis der Spinalganglienzellen. Arch. f. 
Mikrosk. Anat., Bd. 69. 
