THE .\ Kinoes sysTi':.\[ 



35 



the colli ami note that the dorsal root is attached to the dorso- 

 lateral and the ventral root to the ventro-latcral region of the 

 cord. A small ganglion (enlargement) lyinp; in the intervertebral 

 foramen (space between two adjoining vertebrip) and surrounded 

 by the white pcrignnglionir gland (the calcareous l)ody) is found 

 on the dorsal root near its union with the ventral root, but 

 in the frog as a rule the spinal ganglion is continued beyond the 

 point of union so that the two roots appear to meet in the gang- 

 lion itself. Examine the periganglionic gland and then remove 

 it so as to reveal the small brown i^pinal ganglion. 



Label the described parts on the outline of the dorsal aspect 

 of the brain and spinal cord, 



SyNOPTU- SlMMAHY OK THK DIVISIONS OK THE NeRVOUS SySTEM 



Olfactory lobes 



Brain 



Nervous 

 svstein 



f Central 

 system 



Peripheral 

 svstein 



Forebrain hemi- 

 spheres 

 Lateral ventricles 

 Pineal body 

 Pituitary body 

 Infundibuhim 



Third ventricle 

 Optic lobes 

 Aqueduct of 

 I sylviu.s 



I CerebeUum 

 Hindbrain { Oblongata 



I Fourth ventricle 



Forebrain 



Interbraia < 



Midbrain 



Spinal cord 



I. Olfactory 

 II. Optic 

 III. Oculomotor 

 j IV'. Trochlearis 

 f Cranial nerves \'. TrlRcminiis 



\'I. .Vbducens 

 VII. Facial 

 VIII. Auditory 

 IX. Glos.sopharynntal 

 X. VaRUs 

 Spinal nerves 1 to U) 

 Sympathetic system. Not included in tiiis study 



