(121) 
in a thick-crusted state of 8, from Finmark, received from Dr. Th. Fries 
(Acarospora peliscypha (Wahl.) Th. Fr. Lich. Arct. p. 89) and may dimin- 
ish the value of the distinction of L. thamnoplaca. The arctic Acaro- 
spora peliscypha, Th. Fr., to which I cannot but relate the equally 
granitic A. rugulosa, Koerb. Parerg. p. 59 (e descr.) if on the one hand 
not easily to be kept apart from our # squamulosa, is yet, on the other, 
most readily conceivable (Koerb. 1. c. p. 61) as only a better-developed 
condition of our third form,—y, discreta, Fr.; and, were it possible to 
distinguish specifically the granitic states of ZL. cervina, these last might per- 
haps be subsumed (as in the writer’s Lich. Calif. p. 21) under an emended 
L. peliscypha. This v. disereta, long known only by the inappropriate 
designation of Endocarpon smaragdulum, Ach., is at once the most 
degraded, and the most common form of the species, and occurs every- 
where on the granitic rocks of the northern states, and northward to 
Greenland (‘minime rara,’ Th. Fr. 1. c.). It is observable, rarely, in 
excellent condition, on dead wood (near Boston) and the oxydated state, 
f. sinopica (Endocarpon, Wahl.) is conspicuous on our alpine rocks (White 
Mountains).—It is only by the fewer and larger spores that Koerber 
distinguishes his Acarospora glebosa, Syst. p. 156, from his A. smarag- 
dula, but the difference is an interesting one; and the plant first-named 
having occurred (similar in all external respects, and exactly so in the 
dimensions of the spores to the European specimens, but the number of 
spores in the thekes, so far as seen, averaging only from 12 to 20) in Cal- 
ifornia (Mr. Bolander) may be here indicated as f. glebosa.———Under the 
name Sarcogyne, Flotow first distinguished a little group of lecideoid apo- 
thecia, apparently and perhaps finally quite without thallus, which there 
seem to be sufficient reasons for regarding an anamorphosis of L. cervina. 
Borrer (Leight. Angioc. Lich. p. 17) referred at least the Lecidea privigna, 
Ach. (which he distinguished from Lichen simplex, Dav.) to the same 
species which should also include Endocarpon smaragdulum of authors, 
and is followed in this by Mr. Leighton, 1. c.; while Dr. Nylander 
(Prodr. p. 79. Lich. Scund. p. 176) has explained the whole group as 
aberrations of L. cervina. I possess specimens of the graniticoline Ver- 
mont lichen above referred to L. cervina 2 squamulosa, in which the soon 
biatoroid apothecia occur not seldom quite free of the scales, when I can- 
not see that they differ appreciably from other, always ecrustaceous ones, 
referable to Sarcogyne privigna. Compare here Acarospora glaucocarpa, 
v. depauperata, Anz. Lich. Lang. n. 395 with Sarcogyne platycarpoides of 
the same author, Ibid. n. 359; and also Nyl. Scand. pp. 175-6. All ‘the 
best known European forms are found here. The var. privigna, in vari- 
ous conditions, and including as well f. simplex, Koerb., as f. Clavus, 
Koerb. (v. ewcarpa, Nyl.) are inhabitants of our granitic rocks; and the 
v. pruinosa, Nyl., takes their place on our limestones.——In the anamor- 
phosis under consideration Lecideine structure is so closely simulated 
that it is easy to compare Sarcogyne platycarpoides, Anz. (Lich. Lang. 
16 
