Method V 39 



The myelin sheaths are colored black. In longitudinal sec- 

 tions the axone or axis cylinder shows red fibrils more or less 

 parallel, distributed in the axial space and imbedded in the color- 

 less neuroplasm. In transverse sections the fibrils appear as dots. 

 Due to imperfect fixation or to shrinkage otherwise produced, 

 some fibers will show the contents, of the axial space fused into 

 a more deeply stained central mass, sometimes stellate in form. 



The clefts of the segments of Lantermann may be observed 

 in longitudinal section of the sheath. 



The sheath is blackened by a reduction product of the 

 osmic acid. 



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