Chap. XX.] 



THE SYMPATHETIC SYSTEM. 



167 



being an axis cylinder invested in a neurilemma, with 

 oblong nuclei indicative of nerve corpuscles. 'But there 

 are some medullated nerve-fibres to be met with in 



Pig. 97. A group of Ganglion Cells interposed in a bundle of Sympa- 

 thetic Nerve-fibres ; from the Bladder of a Eabbit. (Handbook.) 



each bundle, at least, of the larger nerve-trunks. 

 These in some cases show the medullary sheath more 

 or less discontinuous, and with a varicose outline 



Fig. 98. A small collection of Ganglion Cells along a small Bundle of 

 Sympathetic Nerve-fibres in the Bladder of the Eabbit. 



Each ganglion cell possesses a capsule. The substance of the ganglion cell is 

 prolonged as the axis cylinder of a nerve-fibre. (Atlas.) 



(Fig. 96, c), owing to a uniform local accumulation of 

 fluid between it and the axis cylinder. The small or 

 microscopic bundles of nerve-fibres have an endothelial 



