Homo 

 07.3x54.0 



Su crofii 

 03.4x51. 3 



COIUK I 



ti.*4r;.!> 



;M 



Cyiiocephalus 



60.7x56.3 



Felii domesHca Lopu ciiinVuhi.s 

 r>ft.O*54.O 44.. r >x36 



r 

 v 



Mus njllus olbus Mtis inu.sculugulhus AtbiapiMi cinerra 

 37. * 33.7 ; * 3t\A*i:2.n- 31.5x28.0 



FIG. 22. MOTOR NERVE CELLS OF VARIOUS MAMMALS, all from the cervical 

 region of the spinal cord. The cells are represented all uniformly magnified. 

 The cross lines on each figure indicate the directions in which the original cells 

 have been measured. After Irving Hardesty. 



66 



