THE FEMALE GAMETOPHYTE 



81 



seems reasonable, but it must be noted that the rudimentary 

 plate occurs also at the third mitosis, and so may be a reminis- 

 mce of a much more remote ancestry with cellular prothallia. 

 In connection with the reduction division it is of interest 

 to note the number of chromosomes found among Angiosperms. 

 The following table, arranged in the Engler sequence of fami- 

 lies, although more extensive than any hitherto published, is 

 far from complete. The numbers in parentheses were inferred 

 rather than actually counted: 



Th e Number of Chromosomes recorded for Certain Angiosperms 



* One anther constantly 14. 



