Dr Lauder Lindsay on the Flora of Iceland. 71 
species have been so called.” Peziza lentifera “may be 
Nidularia campanulata, N. striata, or Crucibulum vulgare, 
Tulasne. All are included by Linnzus, though distinguished 
as varieties.” Agaricus fimetarius—‘ Coprinus comatus, 
Fr., probably. A. fimetarius, Sow., however, is Coprinus atra- 
mentarius; A. fimetarius, L., is Coprinus cinereus.” Mr 
Berkeley adds, “It is scarcely possible to say what is meant 
by the names of fungi. . . . It is impossible to get 
nearer to the truth without specimens.” 
2. Lichens.—Isidium defraudans, Ach., appears to be 
Parmelia poliophea, Fr.; Lichen defraudans, Olafs. It. 
Island. app, p. 17; ZL. poliopheus, Wahlb. Lapp., p. 410, 
t. 27, f.3; Lecanora poliophea, Ach., Lich. Univ., p. 398. 
Probably all these are the Lecanora spodophea, Ach., of 
EK. B., t. 2083, f. 3, p. 82; and Hooker’s Brit. Flora, vol. i1., 
p. 188. The latter is said to be closely allied to Lecanora 
- aipospila, Ach., E. B., t. 2083, f. 2, p. 81.- But neither ZL. 
spodophea nor L. aipospila can now be identified as distinct 
British species, whereas it is probable that Isidium defrau- 
dans is an isidioid condition of our familiar Lecanora sopho- 
des, Ach. The latter, however, has not been mentioned by 
any botanist as a native of Iceland; and if it really occur in 
its normal or fruit-bearing state, it has probably been con- 
founded with some other Lecanora, or altogether overlooked! 
Lichen lacteus, L., is the Variolaria lactea, Pers., E. B., 
p- 50, t. 1998: it is probably a sterile and variolarioid state 
of the common Lecanora parella; but it may be a similar 
state of L. tartarea, L. glaucoma, L. Hematomma, or L. 
cinerea ; or even of Lecidea atro-alba, Flot., or L. ambigua, 
Ach. The plate in E. B. would lead me to refer it to LZ. 
parella; but that in Westring’s ‘ Schweden’s vorziiglichste 
Farbeflechten ” (1805) would attribute it rather to L. cinerea. 
The name of the lichen in the last mentioned work, ‘* Milch- 
flechte” (German and Swedish), is nearly identical in meaning 
with the Icelandic name of the Lichen lacteus, ‘“ Mjolkhvitr 
Mosi.” From this it may be inferred that the Icelandic lichen 
may be the same as the Swedish one, and that both are equally 
referable to L. cinerea. But there is an objection in the 
fact that L. cinerea does not possess the colorific property that 
