

FIG. 157. Longitudinal section of sciatic nerve of 

 new-born dog eight days after the nerve had 

 been divided. Union had already taken place. 

 At the extremity of the central end (A) grow- 

 ing fibres are seen running in various direc- 

 tions towards the cicatrix (B); C is the 

 peripheral end, into which a few fibres are 

 already penetrating. (Marinesco.) 



TTV 



JL- m 



C-4 



- m 



-m 



FIG. 158. Longitudinal section of dog's nerve, 

 twenty-one days after the nerve had been 

 divided. A more advanced condition is seen 

 than that shown in fig. 157. A is the central 

 end ; B the cicatrix of union, where the nerve- 

 fibres are seen in great numbers taking an 

 irregular course. Into C, the peripheral end, 

 many fibres have already successfully pene- 

 trated ; m, m', m", etc., are the terminal 

 swellings of fibres growing from the central 

 stump and directed towards the periphery, 

 except in the case of m", where the twisting 

 of the new fibre in its efforts to grow had, at 

 the time when the animal was killed, directed 

 the termination backwards. (Marinesco,) 



