Occurrence and Significance of Chitinoclastic Bacteria 



601 



AVERAGE NUMBER OF COLONIES ON CHITIN AGAR 



lURFACE 



10 



15 

 20 

 25 



30 

 35 

 40 

 50 



60 

 70 

 75 



80 



90 



100 



200 

 250 



300 

 350 

 400 

 500 



600 

 700 

 750 

 800 

 800 

 900 

 1000 



© 



(D 



10 

 BACTERIA /ML 



100 



500 



Fig. 4. Average number of colonies on chitin agar. 



roughly whetlier a chitinoclastic flora was associated with zoo- 

 plankters, and, by sampling before and after crushing the plank- 

 ter, whetlier tlie microflora was associated internally or externally. 



