6 Transact hns of the 



ders of the finer nerve fibres are proLably formed by the fibriUm 

 originating in the terminal netivork ; some of them may also arise 

 from the small triangular ganglionic bodies of the grey layer. 



4. The Ganglionic Bodies of the Sym^Kithetic Ganglia. — These 

 are especially distinguished from those of the spinal marrow and 

 brain by being enclosed in a membraniforra capsule with which they 

 are in a certain manner connected. From the body, enclosed within 

 the capsule, a number of larger and smaller processes arise, consist- 

 ing, like those proceeding from the ganglionic bodies of the spinal 

 marrow and brain, of fine granular fibrillje. These, however, 

 cannot be distinctly traced over the body from one process into the 

 other as in the former case ; on the contrary, the whole body 

 appears more as a mass of granules surrounding the nucleus. 



In selecting a sympathetic ganglionic body of the gangliated 

 cords of man as a type, we observe from two to four of the larger 

 processes, directly after arising from the body, piercing the capsule 

 and disappearing, at a distance of about -jIq mm, or more, in the 

 form of naked axis cylinders among the neighbouring bundles of 

 sympathetic nerve fibres. The two largest processes frequently 

 arise from opposite points of the body ; in some cases, the larger 

 one of these, again, divides already dichotomously within the capsule, 

 so that the axis cylinders arising from this division subsequently 

 pierce the capsule. The axis cylinders arising from the processes 

 possess a sheath manifesting itself by a double contour, and which, 

 in many instances, may be traced back over the body ; the diameter 

 of the axis cylinders measures about sl^ mm. 



The smaller processes, arising from the body, are more numerous 

 than those just mentioned, and consist mostly of only two or even 

 one fibiil. After a course of aw to 2%-s mm. alongside of the 

 body, they enter the capsule at its inner surface, and form, by 

 means of ramification and reciprocal connection, a netuorJc extend- 

 ing throughout this membrane ; the interspaces of the network 

 are filled up by small granules. The capsule of the sympathetic 

 ganglionic bodies, therefore, represents complicated, memhraniform, 

 nervous structure, derived from and connected with the body which 

 it encloses. On the surface of the capsule, formed in this manner, 

 a number of fine fibrillae arise from the network, a part of which 

 pass, in the form of a finely reticulated plexus, over into the 

 capsules of neighbouring ganglionic bodies, and thus establish a 

 reciprocal communication; the rest surrounds the axis cylmders 

 arising from the larger processes which have pierced the capsule, 

 and, running with these in the same direction, unite among them- 

 selves to form finally the so-called sympathetic nerve fibres. 



Scattered over the inner as well as the outer surface of the 

 capsule, a considerable number of round or oval nuclei are observed. 

 They are especially numerous in the reticulated fibrillous plexus 



