APPEARANCE OF GROWTH ON CULTURE MEDIA 221 



some few cases the character of the edge. Figs. 149 to 155 

 show some of the commoner types. 



On agar and gelatin plates made so that the colonies are 

 well isolated, the form of the latter, the rate of their growth, 

 the character of the edge and of the surface, the elevation 



Fig. 158. — Amoeboid colonies on a plate. X |. 



Fig. 159. — Large effuse colony on a plate. The edge is lacerated. Inci- 

 dentally the colony shows the rate of growth for six successive days. X f . 



