44 ON THE BLUE REACTION GIVEN BY IODINE IN CERTAIN FUNGI. 
P. violacea, .Pers., in which the ‘ gelatina hymenia”? becomes ‘bine, 
and P. firma, Pers., P. plumbea, Fr., P. cpaeheettg Nyl., P. undella, 
Fr. ered, Sow., and P. repanda, ‘Wahle nb., in which the thece 
alone, especially tie apices, turn blue. It pion therefore, that 
there is hope useful results in the determination of certain 
species of fun fas a more continuous and systematic application of 
this test ; ‘ig ae we be disappointed in this expectation enough 
of interest attaches to the subject to warrant further investigation. 
Impressed with these ideas I have taken occasion during the past 
year to apply iodine to the hymenium of all the Pes’ze which have 
passed through my hands in a fresh ainie, for when dry no reaction 
is obtained, and I give the result below 
The common tincture of iodine as Bias at the shops, diluted to 
one-half with spirits of wine, appears to be pte most aap strength. 
enium and subjected to light pressure ante am er 
of 300 to 4 ] at how if there be any reactio 
The shade of blue obtained varies very much, from a light cerulean to 
mucous matter enveloping the asci and paraphyses is alone affected. 
I have taken no notice of a vinous kai = nt which is occasionally 
observed, because it appears to me to e fr ater or less 
readiness of the parts to imbibe the quid, aa hence to become of © 
different degrees of density. 
Peziza badia, P. Summits of asci pale blue. 
P. succosa, Berk. Summit of asci blue. 
Pe beast Fr. No reaction. 
anda, Wahl. Apices of asci and “ gelatina hymenia ” blue. 
P. Bedi ycarpa, Curr. Sh fs € spring hymenia”’ faint blue. 
P. cupularis, L. No reacti 
Yo puiitike, Fr. Tips of ‘pesphyses deep purple blue. 
P. melaioma, A. and 8. No re 
* gh 2 it Sch B. and Br. Tips of paraphyses deep purple blue. 
z vitellina, Pers. Tips of paraphyses deep purple black. 
. scutellata, L. Tips of paraphyses dee le black. 
P. livida, Sch. No reaction. Pie 
P. ciliaris, Schrad. No reaction. 
P, apala, B and Br. No reaction. 
SPN OU eenrecreccemsmusmmer case: reek # 
* As I intend to continue this in I 
obtain fresh, I shall feel as ibs oops rei any si 9 of this Journal who will do me 
the favour of forwarding to m ry address b orn 
list. Address—Canonbury, Klopaiand, uk Boewstary as species not named in my 
