i6S 



THE FROG 



polar ") nerve-cells (Fig>. 48 and 54, A), each continuous 

 with a neuraxis and enclosed in a tissue formed partly 



m.s 



I 10. 54.— A, ncrve-cell from the grey matter of the spinal cord of a frog, and the 

 nerve-fibre arising from it ; J3, cell from the ganglion of a dorsal root. 

 nc. neurilemma ; ni(. nucleus ; }ix. neuraxis ; in. s. medullary sheath. (After 

 Howes.) 



of the axis-fibres of nerves which enter the grey from the 

 while matter, losing their medullary sheath as they do so, 



