158 THE ORIGIN OF THE NERVOUS SYSTEM 



46 



47 



FIGS. 45-47. Fig. 45, motor cell of ventral horn of spinal cord from 

 human embryo 30 cm. long (from Barker, 1901, after von Lenhossek); 

 Fig. 46, pyramidal neuron of cerebral cortex of rabbit (from Cajal, 1909); 

 Fig. 47, neuron with short, branching axon, from cerebral cortex (from 

 Cajal, 1909). 



