1877.] Botany. 171 
2. Cerrartia, Ach., Fr. 
1. Islandica, Ach. On dry ground in open woods. 
2. ciliaris, Ach. On old fence rails and dead trees. 
3. lacunosa, Ach., and var. Atlantica, Tuckerm. On trees,etc. Not 
very common. 
4. aleurites (Ach.), Th., Fr. Only one specimen found, on an old 
fence rail ; Killingwor th; 2. W... 
3. Evernta, Ach., Ma ann. 
prunastri (Z.), Ach. Killingworth, F. W. H.; Orange, Prof. D. 
C. Eaton. On rocks; not common. 
4. USNEA, Ach. i 
l. barbata (Z.), Fr., var. florida, Fr., and var. rubiginea, Michæ., and 
var. dasypoga, Fr. The last var. forming long pendent gray 
clusters from dead limbs of our forest trees. 
> 2. angulata, Ach. Near Lake Saltonstall ; Prof. Eaton. Not very 
common. 
5. To (Ach.), Nyl. 
bata (Z.) var. chalybeiformis, Ach. Mostly on old fence rails. 
6. Paid oaii. Norm., Tuckerm. 
1. parietinus (Z.), Norm., and var. lychneus, Scher. On rocks and 
trunks of trees. 
2. chrysophthalmus (Z.), Norm., and var. flavicans, Wallr. On 
trunks and branches of trees: a pretty species with golden eyes. 
3. concolor (Dicks.), (T. candelarius (Ach.), Nyl., var. stellata, Nyl.). 
On bark of trees. 
7. i, (Ach.), De’ Not. 
l. perforata (Jacg.), Ach., and var. crinita, Tuckerm. Especially 
abundant on old stone walls. 
2. tiliacea (Hoffm.), Floerk. On stones and bark of trees. 
3. Borreri, Turn., and var. rudecta, Tuckerm. On old fence rails; 
Killingworth; F. W. H. 
4. saxatilis (Z.), Fr. ae Alfred Barron; Killingworth, 
F. W. H. On ro 
5. physodes (Z.), deh nee rails, ete. 
6. colpodes, Ach, Wallingford; A. Barron. 
T. caperata (ZL. ), Ach. Old fence rails and trunks of trees. 
8. conspersa (Hhrh.), Ach. Particularly abundant on exposed rocks 
and on old stone walls. Our most common species. 
9. olivacea (Z.), Ach. On living and dead bark of trees. 
8. Puyscra (Fr), Th., Fr. 
1. aquila (Ach.), Nyl., var. detonsa, Tuckerm. On rocks. 
2. pulverulenta (Schreb.), Nyl. Wallingford, A. Barron ; Killing- 
worth, F. W. H. On rocks and trunks. 
3. speciosa ( Wulf., Fr.), and var. hypolenca, Ach., and var. lenco- 
mela (Hschw.). On rocks, ete. 
