124 MANUAL OF ELEMENTARY ZOOLOGY 



conjugation of two like gametes, such as is found in Poly- 

 toma, is known as isogatny : conjugation of unlike gametes 

 is anisogamy. 



In later chapters (pp. 534, 147, 533) there will be found 

 descriptions of the flagellate organisms Hamatococcus, 

 Trypanosoma, and Euglena, which in various respects 

 resemble Polytoma. 



