414 S. W. RANSON AND P. R. BILLINGSLEY 
second group would include the large and medium-sized sensory 
fibers. 
Are there unmyelinated axons scattered among the myelinated 
fibers of the white rami? We must exclude from consideration 
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Fig. 2 Second thoracic ramus communicans in the cat consisting of two 
fascicles, the larger representing the white and the smaller the gray ramus. 
Osmic acid. X 425. 
here the bundles of unmyelinated fibers which run as definite 
fascicles and represent small gray rami included in the white. 
Gaskell (86) found unmyelinated fibers in the white rami and 
said that ‘‘there is strong evidence that they arise from the 
