14 
5. P. citrinuni, (Iloffvn.) Leight. On mortar in walls. 1S81. 
6. P. aiirantiaeillil, (Lightf.) N;eg. & Hepp. On trees and 
rocks. 
b. erytkrellum , (Ach.) On rails and stones. 
7. P. cerinuin, (Hedw.) Naeg. & Ilepp. On trees. 1S64. 
!>. sideritis , Tuck. On rocks, rare. 1868. 
d. stillicidiorum , Fr. On the earth, Smith’s Neck. 1877. 
8. P. pyracea, (Ach., Nvl.J On stone in wall, Kempton street, 
1880. On rails, West Chop, Martha’s Vineyard, 1890. On old shells, 
Smith’s Neck, 188S. 
9. P. ferrugineillli, (Huds.) Hepp. On trees, rails, and stones. 
1864. 
b. Pollinii , (Anz.) On trees. 
c. discolor , Willey. On trees, 1S66. 
10. P. camptidium, Tuck. On trees, N. B. and Weymouth, rare. 
Once on rail, N. B. 1864. 
11. P. yitellimilll, (EhrhJ Naeg. & Hepp. On rails, rocks, 
and rarely on the earth. 
‘ 24 . LECANORA, Ach., Tuck. 
1. L. rubina, (Vill.) Ach. On rocks, rare. 
2. L. Iliuralis, (Schreb.) Schser. On rocks, Fort Phcenix. Fair- 
hayen, and at Potomska, Dartmouth. Rare. 
3. L. pallida, (Schreb.) Seiner. On trees. Common. 
b. ca >ic.r if or mis. Tuck. N. B. and Weymouth. Rare. 
c. angulosa , Hoftm. On trees. Common. 
4. L. Sllbflisca, (L.) Ach. Very common on trees, rails, and 
stones. 
a. allophana, Ach. On trees. &c. 
r. arge?itata , Ach. On trees. Rare. 
d. coilocarpa, Ach. On trees. 
e. distans , .Veil. On trees. Common. 
5. L. Hageni, Ach. On dead wood and atones. 
b. Sambuci , (Pers.) Tuck. On elm and poplar. Weymouth, 
1S67. On the same trees and on beech. N. B . and on poplar, 
Cotuitport. Cape Cod, 1SS6. 
0 >. L. atl'n, (I Iuds.) Ach. On the roots of beech, Naushon Island, 
1867; and on red maple and black birch, Smith’s Neck, Dartmouth, 
