3- 0. lentiginosula, Nyl.? Leight., Great Britain , p 373. A 
very poor plant on white oak, 1SS1 ; only found once. Spores oblong- 
ellipsoid, bilocular, the upper cell wider, .013-18 bv .006-8 mm., 
brown, the hvpothecium without color. Paraphy.ses conglutinate. 
Reaction with iodine from blue vinous red. 
4. 0. cinerascens, n. sp. On dead stump, 1882 ; only found once. 
Thallus greenish-cinerascent, uniform, determinate, about one-half 
inch in diameter. Apoth. black, numerous, sessile, oblong, short, 
the disk plane, with a thin, erect margin. Spores bilocular, oblong- 
ovoid. without color, .013-16 by .004-6 mm. Reaction with iodine 
vinous red. This and the preceding are only mentioned for further 
in vestigation. 
5. 0. varia, (Pers.) Fr. On trees, 1883. Not common. 
b. pulicaris, (Hoffm.) Nyl. 
c. diaphora, (Ach.) Nyl., f. chlorina, Schaer. Apoth. orig¬ 
inally yellow pruinose, but this has disappeared in the herbarium. 
6. 0. atra, (Pers.) Nyl. On trees. Not common. 
b. ha pale a. Ach. 
7. 0. viridis, Pers. On trees, 1866. Not common. The species 
is distinguished by the three-angled spores, a character noted, so far 
as I know, only by Kcerber, Syst., p. 286. 
8. (). vulgata, Ach., Nyl. On trees, and rarelv on dead wood. 
Spermatia needle-shaped, .011-16 mm. long. 
b. lithyrga , (Ach.) Nyl. On shaded rocks, extending to adja¬ 
cent bark, Weymouth, 1866. Spermatia staff-shaped, .009-11 
mm. long. 
9. 0. quaternella, Nyl., Flora , 18S5, p. 449. Apoth. black, 
irregular, heaped, 0.2-3 mm . in diameter, oblong-difform, the margin 
indistinct. Spores in 4s, oblong, 4-locular. .015-18 by .006-7 mm., 
finally brown. Hvpothecium fuscous. Reaction with iodine vinous 
red. Parasitic on Pertusaria ve.lata , 1879. Rare. 
48. ARTHONIA, Ach., Nyl. 
*ApotAecia pale. 
1. A. pyrrllllliza, Nyl., Flora, 1885, p. 447. Willey, Syn. Arfk.. 
n. 84. On trees, N. B. and Weymouth. Spermatia .005-6 mm. long. 
Formerly distributed by me as A. pyrrhula. 1866. 
2. A. cupressina, Tuck. Willey, Op. cit., n. 97. On cypress in 
swamps, 1865; and rarely on dead wood, 1S75. 
