1 



195. 

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jap* a 





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Scale, lo'ng of an English Inch I I x 700. 



Liarge caudate nerve cell, with smaller cells and nerve fibres, from a thin transverse section of the lower 

 pan. of the grey matter of the medulla oblongata of a young dog. The lines of dark granules resulting from 

 the chemical action of acetic acid are seen passing through the very substance of the cell, in very definite 

 directions. Thus the cell is the point, where lines from several distant parts intersect (Diagram. Fig. 393). 

 It is probable that each of these lines is but a portion of a complete circuit (see Diagram, Fig. 39S). a a a. large 

 fibres which leave the cell. b. a fibre from another cell, dividing into finer fibres, exhibiting several lines 

 of granules, ccc, fibres from a younger caudate nerve vesicle. d, fine and flattened dark-bordered fibres. 

 e. three fine nerve fibres running together in a matrix of connective tissue. ///. capillary vessels. 



[To follow PL. LXIII. 



