iv.j NEW DISEASE OF POTATOES. 25 



guish it from them. The rest of the described species 

 have smaller sporidia. 



A few of the germinated examples forwarded by Mr. 

 Wilson are illustrated, natural size, at Fig. 6. It will be 



FIG. 6. 



Peziza postuma, B. and W. 

 Natural size. 



seen that the Sclerotia give rise to long, slender, tortuous 

 stems, and that each stem at length bears a shallow pallid 

 head, which ultimately becomes flat or slightly recurved. 

 The stems are about two inches high, and the cup-like 



