DeWitt, Nerves in the CEsophagus. 389 



agus, except the neuraxes and dendrites of the nerve cells 

 found in the oesophageal ganglia, arise from the vagus nerves. 



PI. XXVI, Fig. I represents, drawn under low magnifica- 

 tion, a surface view of a portion of the intermuscular plexus of 

 the lower part of the oesophagus of a cat. In it we get a gen- 

 eral view of the plexus and ganglia and, to some extent, see 

 the two kinds of nerve cells and various kinds of nerve fibers 

 constituting the nerve trunks. This, however, is better shown 

 in PI. XXVI, Fig. 2, A, which represents a portion of the 

 same figure drawn under higher magnification. In this figure, 

 the motor and sensory cells are plainly distinguished, with their 

 neuraxes and dendrites extending out into the nerve trunks or 

 breaking up in the ganglion. Other non-medullated fibers may 

 be seen passing through the ganglion, the neuraxes of cells of 

 some other ganglion on the way to their destination. Two 

 large meduUated fibers pass through the ganglion without mak- 

 ing connection with any of its cells; these are sensory fiber^s, 

 the dendrites of spinal ganglion cells. We may also distinguish 

 two smaller meduUated fibers, which lose their medullary 

 sheaths near the center of the ganglion and send non-medul- 

 lated fibers to several cells, about which they form pericellular 

 networks. This relation of the white rami fibers to the ganglion 

 and the formation of the end-baskets may be better seen, how- 

 ever, in B of the same figure, which represents a surface pre- 

 paration of a ganglion from the intermuscular plexus of a rabbit, 

 in which the cells with their processes were very imperfectly 

 stained, but the white rami fibers with their telodendria were 

 very clearly brought out. Occasionally in this preparation, only 

 the peripheral zone of the cell is stained, the central part and 

 nucleus and the processes being completely unstained. 



Arrangement and terminatiojts of Nerves in the Submucosa 

 and Mucosa. In the submucosa of the oesophagus, smaller 

 nerve trunks form a finer meshed plexus analogous to Meiss- 

 ner's plexus of the stomach and intestine. These nerve trunks 

 contain meduUated and non-medullated nerves, many of them 

 originating from the intermuscular plexus. Few ganglia have 

 been found by me, however, in this submucous plexus of the 



