94 THE MAIN CURRENTS OF ZOOLOGY 



in 1911, enumerates 522,400. This represents only 

 the named species of living animals and is far short 

 of the actual number. In Pratt's enumeration there 

 are 360,000 insects. We are to understand that the 

 number of living species is much larger since there 

 are many that have not been described and classified. 



