ADDENDA. 495 



I have just discovered that by accepting without question 

 the figure in Woolhope Transactions, 1868, pi. 21, as Agaricus 

 (Entoloma) juhatus, Fr., I have fallen into error with the 

 plate 317 of my illustrations. We have Ag. juhatus in this 

 country but it is not the same as my figure, which un- 

 doubtedly, as I think, represents Agaricus (Entoloma) porphy- 

 ropJiaeus, Ft., on account of the solid stem, purplish in colour, 

 attenuated upwards, pileus neither villose nor squamose, 

 and gills truncate behind, not to mention their colour. 



It must be added that the dimensions of the spores given 

 by Saccardo, evidently are on the authority of Britzelmeyer, 

 whose figure cannot be the species of Fries, and hence there 

 is no authority for spore measurements in Ag. porphyrophaeus. 

 Moreover the delusion was increased by the description given 

 in the Woolhope Transactions, which is not the description 

 given by Fries, and does not represent his Ag. juhatus. I 

 believe that it is less derogatory in me to confess this error 

 than to have made it. (M. C. Cooke.) 



