Fig 28. Transmission electronmicrograph of a mature NMB 



spore of B. dimorpha . Note smooth spore surface. 

 N=nucleus; Pf=polar filament. X 17,100. Inset: 

 NMB spores as they appear in phase-contrast micros- 

 copy. X 2,000. 



Fig 29. Transmission electronmicrograph of a mature MB 



spore of B. dimorpha . Note the surface sculpture 

 (arrow) and the polar cap (upper end of spore) . 

 N=nucleus ; Pf=polar filament. X 18,000. Inset: 

 MB spore as it appears in phase-contrast micros- 

 copy. X 2,000. 



Fig 30. Scanning electronmicrograph of a mature NMB spore 

 of B. dimorpha . Note the smooth surface and lack 

 of a morphologically differentiated polar cap area. 

 X 16,500. 



Fig 31. Scanning electronmicrograph of a mature MB spore 

 of B. dimorpha . Note the surface sculpture and 

 morphologically differentiated polar cap area 

 (bottom of spore). X 16,500. 



