POSITION— RELA TIONSHIPS 



21 



These protozoa under certain conditions show a change in 

 form, usually to a more or less spherical shape, accompanied 

 by a shrinkage in volume and the development of an outside 

 covering, sometimes largely mineral salts, sometimes more 

 organic. When the protozoon has changed to this form. 



Fig. 12.— Same as Fig. 11. 



X 1000. Shows a sporangium containing a 

 mass of spores. 



Fig. 13. — Aspergillus type of mold. 

 X 100. a, conidiophore; b, mass of 

 conidia attached to head of conidio- 

 phore. 



Fig. 14.— Same as Fig. 13. 

 X 1000. (Slightly retouched). 



c, enlarged head of conidiophore; 



d, sterigmata; e, conidia (spores) 

 at end of sterigmata. 



