MULTIPLE NEUROMATA OF THE CENTRAL NERVOUS SYSTEM. Ge 
in a row in the adventitial spaces and frequently fused to assume irregularly-rounded 
forms. If these further coalesced, they formed wide layers in the hyaline adventitia 
of the vessel. These concretions stained with the hematoxylin very like calcareous 
particles, and with polychrome methylene-blue were a diffuse green (fig. 55). 
In the lumbar cord, the pia structure was interrupted at one or two levels and 
Fie. I. 
replaced by small nodules, staining homogeneously yellow with Van Gieson’s method in 
- contrast to the pink connective tissue of the pia. These nodules were immediately 
‘ anterior to the posterior roots, and the staining gave the impression of glia islets which 
had undergone a homogeneous transformation. 
Finally, in a very few sections, well-stained and well-developed ganglion cells—of 
the type of those in the spinal ganglia—were found amongst the extra-medullary 
anterior roots immediately outside the pia. 
