17 
2 <i. PERTUSARIA, DC. 
i. I*, velatil, (Turn.) Nyl. On trees and rocks. 1866. 
-. P. multipillicta, (Turn.) Nyl. On trees; rarely on rocks. 
3. P. communis, DC. On trees and rocks. 
4. P. leioplaca, (Ach.) Schaer. On trees. 1866. 
5. P. ill argil) at a, Nyl. On trees and rocks. Reaction ol' the 
thallus with iodine red. I know not where this name was first pub¬ 
lished, nor whether any description accompanied it. If not, the 
name torquata, Mull. Beitr., n. 731, or firopinquci, ibid, n. 716, both 
of which were issued at the same time, would have the preference. 
The former occurs on trees and the latter on rocks, but I cannot see 
any essential difference between them. 
6. P. pustulata, (Ach.) Nyl. On trees and dead wood, 1866. 
Spermatia staff-shaped, .015 mm. long. Another specimen yielded 
pycnides with ovoid, stylospores, .010 mm. long. The plant, as it 
occurs on poplar, is referred bv Muller. Beitr ., n. 729, to P. mela- 
leuca , Du by. 
7. P. Wulfenii, DC. On trees. Very rare. 
8. P. g’lobularis, Ach. Running over mosses on rocks, N. B. 
and Weymouth. Rare. 
27 . CONOTREMA, Tuck. 
1. ('. 11 rceolatum, (Ach.) Tuck. Common, especially on red 
maple; and. in a depauperate condition, on cones of pitch pine. West 
Chop. Martha’s Vineyard. 1890. Exsic., Lojka, n. 134, 174. 
28. (tYALECTA, (Ach.) Anri. 
1. (x. lutes), (l)icks.) Tuck. On trees, and rarely on stones and 
dead wood. 1864. Exsic., Lojka, n. 81. 
2. (x. Pineti, (Schrad.) Tuck. On the earth and bark, N. B. and 
Weymouth. Rare. 1864. 
.3. (x. geoica, (Wahl.) Ach., *trivialis, Willey. On naked earth, 
roadsides and wood paths, 1873. Rare. The same has been sent me 
from Illinois by Mr. J. Wolf. 
4. (x. fagicola, (Hepp.) l uck. On trees, red cedar, and red 
maple, 1863; Fairhaven, 1868; New Bedford, and Smith’s Neck. Dart¬ 
mouth. The spores, which in some specimens are acicular. and 
