102 BIOLOGY 



growth of mold colonies, and their production of spores can be followed 

 in detail. Several kinds of mold will usually start to growing on the lemon, 

 etc., and may be distinguished by their color. The different species 

 will show differences in spore formation. Sketches of the colonies and their 

 method of spore formation should be made. The type which will be most 

 commonly found are Penicillium, Aspergillus, and Mucor; Fig. 42. 



