86 DIVERGENCE AND PARALLELISM 



Meanwhile we may agree unreservedly with 

 Dr Gaskell's opinion that nothing but good can 

 result from the incursion of the physiologist into 

 the realm of the morphologist. Then, and then 

 only, do we begin to realise how we stand in 

 regard to the facts of comparative anatomy, 

 and to perceive the paramount importance of 

 convergence. 



With regard to the special case of the nervous 

 system we must add that there is no ground for 

 imagining that it is the one organic system 

 throughout the animal kingdom which offers no 

 instances of convergence. 



