157 
heterophylla Fr. Me parait devoir étre plutdt 

1044. rm Wat cep 
rapportee a olzvascens. 
1127. Marasmius candidus Fr. Cette espéce est peut étre le 
M. candidus de Fries, mais lespéce de 
Quélet est tout autre. 
955. Armillaria Jasonis Cke. & Mass. Nest probablement 
que Lep. amianthina développée Juxu- 
eusement sur un substratum tres nourris- - 
sant. 
HOW TO DISTINGUISH THE SPECIES OF 
BRITISH LYCOPERDA IN THE FIELD. 
By Carleton Rea, BiCaliy MA x EG: 
Our member, the Rev. W. L. W. Fyre, has asked me to give 
the Society some notes on the genus LYCOPERDON which will 
enable the student to identify the British species in the field 
and it is with that object in view that I offer these imperfect 
observations. I do not think our English text books set out 
sufficiently and definitely the nature and character of the 
exoperidium in this genus, and as far as I am aware the illus- 
the basis of the sub-divisions of this genus in his work “Les 
champignons du Jura et des Vosges.” Now to thoroughly 
appreciate the characters of the exoperidium it is necessary to 
gather the specimen in a fresh and nice growing condition and 
uninjured as to its external features, although it may be imma- 
ture when sectioned and so would not disclose the nature of 
the gleba as to the colour of the spores in mass and capillitium, 
the presence or absence of a diaphragm between the fertile and 
sterile tissue, and the Presence or absence of a well-defined 
Columella.” To" elucidate these points it is always advisable if 
Possible to secure a specimen of the same species in a riper and 
mote mature condition and then if we have these two factors 
Present we ought without much difficulty to be able to identify 
the species in the field. 
f the exoperidium is very slightly tomentose and becomes 
mooth like a kid glove it is LYCOPERDON BovisTa Linn. ; if it 
® covered only with mealy granules it is LYCOPERDON PUSIL.- 
LUM Batsch, or LYCOPERDON CEPAEFORME Bull.* ; if it consists 
*Pustllum has no sterile base, Cesaeforme has a sterile base of minute cells. 
