114 



THE CYTOLOGY AND LIFE-HISTORY OF 



; A C T E R I A 



precedes their maturation is similar to that already described for cubactcria 

 (Sections B, D above). A nuclear division gives one large and one small 

 daughter nucleus, of which the latter is eliminated. 



,. 31a 1 



JJ®®QJ^ 



2N 



^«®®®\*" 



J.8 17 16 15 



{Reproduced from the Journal of Hygiene). 



Fig. 51 

 THE LIFE-CYCLE OF ACTINOMYCES BOVIS 

 (I) Spore. 

 (2-4) Germination. 



(5-8 and 33-36) Vegetative reproduction in the primary mycelium. 

 (9-17) Formation of " initial cell " by fusion of units from primary mycelium. 

 (18-21) Germination of " initial cell " to give coenocytic secondary mycelium. 

 (22-24 and 37-41) Growth and branching. 

 (25-31) Development and maturation of spore, nuclear reduction. (According to Morris). 



