HuBER, Sy7npathctic Nervous System. 145 



a, neuraxis of a pre-ganglionic fiber, a cerebro-spinal fiber ending in a peri- 

 cellular basket enclosing the cell body of a sympathetic neuron {b)\ c, capsule of 

 sympathetic cells. 



Sketches made from ganglia stained in meth^'len-blue and alum carmine. 

 Camera lucida drawings under 1-12 in. oil im., No. i eye-piece, Leitz. 



Fig. g. Sketch of the course of a preganglionic, a cerebro-spinal fiber in 

 sympathetic ganglia of a frog. Camera lucida drawing, i-i2 in, oil im., No. i, 

 eye-piece, reduced to two-fifteenths. 



A, a medullated cerebro-spinal fiber, which entered the ganglion through a 

 white ramus. An x in the course of the fibers indicates a node of Ranvier ; the 

 fibers become non-medullated at_j'; a, peri-cellular baskets and spirals. 



Fig. 10. Showing the ending of a pre-ganglionic fiber in more than one 

 ganglion. Copied and slightly altered from two of Langley's (87) figures. 



Sp. c, cell in spinal cord ; Ck. G., chain ganglion ; S. G., solar ganglion ; 

 Pr. G., peripheral ganglion. 



A, A\ A^\ pre-ganglionic fiber with branches; a, neuraxis of sympathetic 

 neurons. 



Fig. II. See Plate IX. 



Fig. J2. Scheme to show how a reflex may occur in the sympathetic sys. 

 tern, taken from Langley's (88) account. For description see the text. 



PLATE IX. 



Fig. II. Ending of a sensory neuron in the bladder of a frog. Methylen- 

 blue stained preparation. Camera lucida drawing, 1-12 in. oil im.. No. I eye- 

 piece. Drawing reduced three times. 



A, medullated nerve fiber. An x indicates a node of Ranvier; y, a non- 

 medullated collateral or terminal branch ending in an end-brush. 



PLATE X. 



Fig. /J. Diagrammatic repre.-entation of the distribution of the spinal 

 and sympathetic neurons in a metameric segment of the cord. 

 For description see the text. 



PLATE XI. 

 Fig. 14. Diagram to show tlie course and connection of the neurons inner- 

 vating the sublingual and submaxillary glands. 

 For the description see text. 



