194 GANGLION CELLS WITH STRAIGHT AND SPIRAL FIBRE. 



different parts of its surface, and pass by circuitous 

 routes towards their destination, each bundle being 

 composed of fibres from many different cells situated 

 in different parts of the ganglion. 



Ganglia are extremely numerous in the sub-mucous 

 tissue of the alimentary canal of all mammalia, and 

 in the human subject multitudes may be demonstrated 

 at short distances from one another. 



Connected with the nerves in the pelvis of the 

 kidney I have also demonstrated numerous ganglia 

 of the same kind. From every one of these, bundles 

 of nerve- fibres pass to be distributed to the cortex of 

 the organ. The fine nerve-fibres of the kidney are 

 distributed to vessels and also to the uriniferous tubes. 



244. Of sanglion cells with a straight and 

 spiral fibre. — The structure of the ganghon cells 

 of the ganglia of the frog are remarkable. In the 

 year 1863 I presented a paper to the Royal Society, 

 in which I showed that each cell possessed at least 

 two fibres, and demonstrated the interesting fact that 

 these fibres pursued opjoonite dii'ections in the nerve 

 trunks into which they passed, one apparently going 

 toivards an organ, while tlie other went aivay from it 

 in an opposite direction. One of these fibres formed 

 a beautiful spiral coil round the other. In some cells 

 there was but one spiral turn, but in others as many 

 as eight or ten cowld be counted, while in some again, 

 which were probably the oldest cells, the spiral turns 

 were still more numerous. Tlie spiral fibre comes 

 from the outer part of the body of the cell, and the 

 straight fibre from its central part, so that the tissue of 

 the first is in strtictural contimiity with that of the last, 

 the'bodij of the cell being composed of matter which may 

 be said to be drawn off in one part to form the spiral, 

 and in another to form the straight fibre. 



245. The views of Arnold and others. — Each 

 fibre had several bioplasts in its course, but these 

 were more numerous in the spiral than in the straight 



