(81) 
constricted also at the middle, points to the every way probable inference 
that we have to do here with decolorate, and otherwise imperfect, exhi- 
ditions of the brown spore-type. —— Instead of the very minute, oblong 
spermatia indicated by Dr. Nylander as characteristical, so far as known, of 
the species of this genus, two of those above reckoned (8. Texana, & 
S. phylliscina) exhibit filiform and bowed ones, quite similar to those of 
Phylliscum, Nyl.; the only instance that I am aware of, in Collemei, in 
which such spermatia have been described. It is also observable that 
the large gonidia, and other structural features beside the peculiar color- 
ation under the microscope, of Phylliscwm, associate it with species of 
ynalissa; one of which (S. phylliscina) might almost be called a crus- 
taceous Phylliscum, as the last type has been recognized by Fries as a 
foliaceous Synalissa. 
XXITII.—-OMPHALARIA, Dur. & Mont. 
Dur. & Mont. in Fl. Alg. Mont. Cent. de Pl. cell. in Ann. 3, 12, n. 76, 
bis; Syll. p. 379. Endocarpi sp., Wahl. in Ach. Meth. Suppl. p. 25; 
Fl). Lapp. p. 463, t. 29, f.2. Ach. L. U. p. 300; Syn. p. 100. Par- 
melie dein Collematis sp., et Endocarpi sp., Scher. Spicil. p. 544; 
Enum. p. 233, 260. Synalisse sp., Fr. Summ. Veg. Scand. p. 563. 
Phylliscum, Omphalaria, et Collematis spp., Nyl. Prodr. p. 19, 27; 
Syn. p. 98, 103, 105, 136, t. 3, f.5; Lich. Scand. p. 36. Tuck. in Nyl. 
Syn., & Obs. Lich. 1. c. 5, p. 383. Phylliscum, Omphalaria, Thyrea, 
Arnoldia dein Plectopsora, et Corinophorus dein Peccania, Mass. 
Neag. p. 7; Symm. p. 59; & Opp. var. Koerb. Parerg. p. 429, 443. 
Krempelh, Lich. Bay. p. 99. Omphalaria, et Phylliscum, Anz. Catal. 
Sondr. p. 2; Manip. p.2; Neosymb. p. 2. Phylliscum, Omphalaria, et 
Plectopsora, Stizenb. Beitr. 1. c. pp. 140, 143. Schwend. Untersuch. 
lc. 4, pp. 189, 194, t. 23, f. 3-9. 
Apothecia sub-globosa, thallo plus minus immersa, 1. verrucari- 
oideo-prominula, rarius dein explicata scutelleformia. Spore ellip- 
soidez, simplices, incolores. Spermatia ellipsoidea, aut nunc fili- 
formia arcuata; sterigmatibus simplicibus. Thallus foliaceus 1. 
rarissime fruticuloso-ascendens, umbilicato-affixus; collogonidiis 
plerumque solitariis glomeratisve, nunc moniliformi-concatenatis ; 
filamentis medullaribus szepius conspicuis. 
This section of Eucollemei (Collema, sensu latiori) is adopted here in 
the signification in which Montagne understood it; as embracing the 
Collemas which are attached to the substrate at a single point. Adding 
the anatomically similar Synalissa symphorea, the section accords with 
Omphalariei, Koerb.; and leaving out the Synalissa named, as a separate 
generical type, it answers exactly to Omphalaria, Anz. (I. cc.) excepting 
only, as regards both authors, in the case of O. phyllisca (Endocarpon, 
11 
