CHYTRIDIINEAE 



71 



pycnochytrian, 8. Wurthii, is peculiar in having several 

 broods annually. 



There is a wide range of nuclear form and mode of 

 division in different Synchytrians. Stevens reminds us 

 that larger nuclei are found in these fungi than in any other 

 plants : the synchytrian nucleus often measures 35/ji, the 

 nucleolus lip. in diameter ; an average vegetative nucleus 



a ^ b ^^^ c ^0^~ d -^^ f 



FIG. 17. SYNCHYTRIUM STELLARIAE, FROM STELLARIA MEDIA. GERMI- 

 NATION OF RESTING CELL IN WATER AFTER IT HAD BEEN KEPT DRY 



ALL WINTER, a, more than half the protoplasm has streamed out 

 of its capsule ; 6, 4 hours after a ; c, 7 days later, the sorus had been 

 subdivided into sporangia for 5 days ; d, sorus completed, sporangia 

 separating ; e-g, formation of zoospores ; 2 hours between e and / ; 

 45 minutes between / and g. a-d X 145, e-g X 375. After de Bary. 



in plants being from 5/x, to 9p. The host-cell increases from 

 ISP to 100 p. 



We may now consider a few details of the life-cycle in 

 this genus. First, as is desirable in all study of protists, 

 we may consider changes as seen in the living organism. 



An account of the germination of the resting cell of 

 8. Stdlariae as seen in the living state has been left us by 

 de Bary. 



