624 



NERVOUS SYSTEM 



R.d. 



fc.w. 



Fig. i. 



Fig. 1. Diagrammatic Representation of the peripheral Nervous System of a Bird. Ventral 

 view. Left side showing the Somatic, right side showing the Visceral Nerves. 



IX. N. glossopharyngeus ; X. N. vagus, C. G. H. P. its distribution to the Carotid, the Heart, 

 Lungs, Stomach and Gut; XII.l, Lingual branch and XII.2, Syringeal branch of N. hypo- 

 glossus ; Sy. Sympathetic ganglion of the first spinal nerve. 



Fig. 2. Diagrammatic view of a transverse section through the spinal cord on the level of the 

 exit of a typical spinal nerve. 



A.H. and P.H. Anterior or ventral and Posterior or dorsal Horns with ganglia, of the grey sub- 

 stance ; in the middle of which is seen the central canal ; Sp.G. the Spinal Ganglion of the 

 dorsal root of the spinal nerve; Sy.G. the Sympathetic Ganglion; R.d., E.ve., R.vis. 

 Dorsal, Ventral and Visceral (or sympathetic) branches of the spinal nerve. 



