2M 



ANATOMY OF THE CENTBAL NERVOUS SYSTEM. 



the layer of medullated fibers, partly -within the same also, lie the cells hitherto 

 designated as ''granules.'' I have shown three types of these in the accompanying 

 illustration {a, ft, c). Moreover, cells with a very much branched neuraxon are every- 

 where present (e). 



The fibrous net-work, ^^'hich all these elements form, is naturally made much 

 more complicated on account of the fact that the neuroglia-cells lie everywhere 

 within it, and that the processes of the ventricular epithelium extend far into 

 the substance of the bulbus olfactorius. The illustration, combined, in the main, 



Medulla of the lobii3 



Cortex of the lobua 



Mitral cells of the cortex 



Surface of the cortex with the glom- ", 

 eruLi aud the iila olfactoria / 



Fig. 142. — Section through the olfactory mucous membrane, the lamina 

 cribrosa, and the bulbus olfactorius. The elements are combined schematically, 

 but the relations, especially the branching and form, are taken from preparations. 



from drawings by Tan Geliuchten, was kept as simple and diagrammatic as possible. 

 Everything must be imagined much denser and richer in fibers and cells. 



The entire formation of the bulbus may be easily traced back to the 

 common cortical type. If Fig. 142 is turned upside down and compared with 

 Pig. 152, that fact is apparent at once. The text to the left of Fig. 142 is 



