EMBRYOLOGY 393 



tenth, then into the same with 5 per cent, of collodion added, 

 evaporates almost entirely away, and passes through cedar oil 

 into paraffin. 



For Mitochondria and Golgi apparatus it is necessary to treat 

 uteri as does Artom (above explained), and then fix in the 

 proper fluid. 



867. ECHINODERMATA, CCELENTERATA AND PORIFERA 



See the chapter on " Zoological Methods." 



