PHYSIOLOGY OF THE INVERTEBRATA. 



337 



The composition of the ashes of the nervous matter in each 

 case is represented in the following table : — 



The first table gives the chemical composition of the ner- 

 vous matter in a dri/ state ; the following table gives the 

 composition of the nervous matter with its accompanying 

 water : — 



The last two tables represent the averages of six analyses 

 in each case. 



