NEW DISEASE OF POTATOES. 



27 



500 diameters. Each colourless bladder, sack, or bottle, 

 is termed an ascus, from askos, a bag, bladder, or bottle. 

 Each ascus, as at Fig. 9, contains eight oval spores or 

 lia. These bodies, one of which is farther enlarged 



x-400- 



FIG. 8. 



Peziza postuma, B. and "W. 



Section through fragment of cup. 



Enlarged 400 diameters. 



X-500 



FIG. 9. 



Peziza postuma, B. ai:>l \v". 



Asci, paraphysis, and sporidia. 



Enlarged 500 diameters. 



to 1000 diameters at B, are termed sporidia because they 

 are not supported on threads or fine branches like many 

 other spores, but are carried free in an ascus or transparent 

 bladder, in which position they have arisen from a dif- 



