198 



SEX IN MICROORGANISMS 



Fig. W. Life cycle of Ceratoviyxa blennius, from Noble (1941), redrawn. 



1, zygote, released from sporocyst in gut of host {Hypsoblemmts gilberti); 2-5, 

 growth accompanied by nuclear divisions with four chromosomes; 6-10, further 

 growth and asexual reproduction; 11-17, sporognoy, each pansporoblast (11-13) 

 producing two spores (14-16); 14, meiosis, producing two nuclei each with two 

 chromosomes. 



