18 
.029-42 by .003-5 mm •' 6-8 locular, are in others fusiform, .0x3-18 by 
.003-45 mm., and 4-6 locular. 
[fr. radiatilis , Tuck., which occurs in N. 13 ., is, according to Syn. 
I, p. 219, a fungus.] 
29 . URCE0L4RIA, (Ach.) Plot. 
i. U. SCl'Uposa, (L.) Nyl. On the earth, rocks, and dead wood. 
A state on the shaded side of stones in walls, in Avliich the thallus is 
yellow, was formerly designated by Tuckerman as v. ochroleuca. 
But the color fades out in the herbarium. 
b. parasitica, (Sommt.) Parasitic on the stjuamules of Cla- 
donias. 
30. THELOTREMA, (Ach.) Eschw. 
1. T. subtile, Fuck. On trees, mostly in swamps. 1866. 
2. T. lepadinum, Ach. On trees in deep woods, Deerfield 
swamp, 1873; an d in the swamp north of Turner’s pond. 1876. Very 
rare. 
[ My via ngin m Duricei , Mont, and Berk., Tuck. Syn . I. p. 261. 
which occurs here (1S76), is, according to Dr. A. Minks, not a 
Lichen. See Minks, JVas ist Myriangium? in Bericht der Dentsc/ien 
Bat. Gesellsc/iaft , 1890, Heft 8.] 
Tribe II. LECIDEACEI. 
31. STEREO! Al EON, Schreb. 
i- S. pascliale, (L.) Fr. On the earth and rocks. Rare and 
poor. 
2. S. den lid atu ill, Elk. On the earth. Nantasket. Sterile. 1875. 
3. S. COlldensatuin, Holfm. On the earth. Often sterile. 
4- S. pileatuui, Ach. On stones in walls. On a heap of stones, 
near Howland’s spring, of time. 1881, i8Sq. 
32. (LAD0N1A, 1 Ioffm. 
* Fuse o’. 
1. C. aleicornis, (Lightf.) Elk. On the earth, N. B. and Wey¬ 
mouth; occasionally with fibrils at the margin of the squamules. 
2. C. symphycarpa, Fr. On the earth. 1865. 
3. C. Mitrula, Tuck. On the earth. Rare. 1865. 
