THE FROG 



CHAP, 



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

 with a neuraxis and enclosed in a tissue formed partly 



m.s 



Fig. 54. — A, nerve-cell from the grey matter of the spinal cord of a frog, and the 

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

 ne. neurilemma ; nzc, nucleus ; nx. neuraxis ; m. s. medullary sheath. (A/ter 

 Howes.) 



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

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



