30 
BRITISH THELEPHOREI. 
when moist, cracking when dry ; spores cylindrically ellipsoid, 7-8 
X 4 p. 
On wood. Carlisle, Coed Coch, Glamis. 
34. Corticium atro-virens, Fries Hym. Fur. 651. HandbJc. No. 931. 
Stev. Frit. Fung. II., 277. 
Irregularly effused, thin, dark greenish ; margin and substratum 
tomentose, of the same colour ; hymenium waxy, smooth, pruinose 
with white ; spores subglobose, 4-5 p diam. 
On rotten wood, leaves, sticks, &c. Epping, Coed Coch. 
C. Amphigenous , very thin , innate , throwing off the hark. 
35. Corticium nigrescens, Fries Hym. Fur. 556. 
Effused, interrupted, when the epidermis is cast off naked, 
innate, thin, yellowish, then becoming blackish; hymenium here 
and there papillose, waxy, sub-pruinose ; spores cylindrically 
oblong, obtuse at the ends, curved, 18-20 X 5-6 p. 
On branches. Carlisle. 
36. Corticium comedens, Fries Hym. Fur. 656. Handhk. 942. Stev. 
Frit. Fung. II., 281. 
Effused, innate, growing beneath the bark ; when the epidermis 
is cast off naked, lilac, growing pale ; hymenium even, smooth, 
cracking when dry ; spores cylindrically ellipsoid, often curved, 
14-16 x 6-7 p. 
On branches, especially hazel. Common. 
CONTROVERTED AGARICS. 
By M. C. Cooke.* 
The practical completion of the “ Illustrations of British Fungi ” 
affords me an opportunity, and an excuse, for a few brief observa- 
tions on some of the species which are open to discussion. It seems 
to me not of so much consequence whether any distinct form of 
Agaric should be called a species, or only a variety, as it is to have 
a definite name by which such a form, or variety, or species, can be 
distinguished, and a true and faithful figure to which reference can 
be made. Notwithstanding this, it cannot be an advantage to 
science that species should be called by names which assume that 
the plants represented are the same as those which have been 
described by older authors under such designations. It may be 
that I have not always been wholly free from error myself, but 
wherever such is shown to be the case, 1 am ready to retract, 
since I know that to “ err is human,” and during the course of this 
paper I shall not hesitate to express my doubts frankly, and 
* Paper read at the Woolhope Naturalists’ Field Club, September 30tb, 
1890. 
