THE NERVES OF THE METENCEPHALON. 



99 



Fig. 71. — Brain andnerve 

 cordj of a new-bom scorpion, 

 seen from the hasmal surface. 



Fig. 72. — ^First two free bran- 

 chial neuromeres, with the lemma- 

 tochord, spinal ganglia, and spinal 

 nerves for an adult scorpion. 



