96 MOORE— MOST PRIMITIVE LIVING REPRESENTATIVE [April 24, 



a sexual or non-sexual motile stage. In the very highest type of 

 reproduction in the green algse the male gamete alone represents 

 the Chlamydomonas stage. Indeed, we may well assume that the 

 motile male gamete of the mosses and ferns constitutes the last 

 remaining type of the original Chlamydomojias condition, which 

 with other more positive evidence points to the origin of such land 

 forms from a Chlamydomonas-like ancestor. 



Although practically all the evidence for the position taken has 

 necessarily been omitted, it is hoped that enough has been said to at 

 least indicate the unique and important position occupied in the plant 

 kingdom by the alga Chlamydomonas. 



