19 
A. impolita var. Schcer. En., p. 243, Almq., p. 23. A. lobata Mass, 
fiic., p. 52 andf. 97. Pachnolepia Kbr. Syst., p. 296. Exs. Lojka 
Hung., n. 93.—On rocks and earth. Europe. Pachnolepia decus- 
sata Kbr. Syst., p. 297, fig., p. 273 (Arthonia FI. Bot. Zeit. 1850, 
P • 57 °>) is considered by Kbr. and Almq., p. 24, not to differ from 
var. lobata. But according to the latter, the original plant of FI. is 
not an Arthonia but near to Schismatomma ( Lecanactis ) abietinum. 
According to Lamy, n. 556, Nvl considers it as rather a Chiodecton 
or the type of a new genus. 
Var. snbliisca, Nyl. Apoth. naked.— Pr. Gall. p. 165. 
Var. ehiodectoiioides, Tuck. Apoth. minute, immersed in thal- 
line warts.—California in hb. Tuck. 
110. A. medusula, (Pers.) Nyl. Apoth. blackening, slender, 
radiate-divided, white-pruinose. Spores, as figured in Hepp., n. 898, 
2-6 locular, .011—18 by .0025-5 aim. Spermatia staff-shaped, .004-5 
mm. long. Opegrapha Pers. Act. IVett. 2, p. 15. Nyl. En., p. 
132, Flora 1881, p. 6, Almq., p. 23. A. pruinosa var. Nyl. 
Arth.,p. 61, Pr. Gall., p. 165.—Europe. 
hi. A. liniitata, Nyl., En., p. 132, {nomen. ,) as a subsp. of 
A. pruinosa. —Ceylon. 
112. A. impolitella, Nyl., Flora 1867, p. 7, (not seen,) prob¬ 
ably belongs to this division—Calcutta. 
113. A. bauistroidea, Nyl. Thallus thin, white, somewhat rug- 
ulose, indeterminate. Apoth. pale brown, innate, plane, stellate- 
difform. Spores oblong-ovoid, 6 locular, .016-17 by .006-7 ami. 
Reaction vinous red.— Flora 1881. p. 6. Newton, Portugal lichens, 
p. 67, to whom I am indebted for a specimen.—Portugal. 
114. A. bifornffs, (Flk.) Schmr. Thallus white, effuse, mealy. 
Apoth. brown and blackening, rounded, plane or convex, pruinose. 
within dark. Spores oblong-ovoid, 4-5 locular, the upper cell 
larger, .012-20 by .006-8 mm. Reaction from blue vinous red. 
Spermatia staff-shaped, .005-6 mm. long, figured in Hepp., 11. 229. 
— Lecidea Flk. D. L., n. 122. Arthonia Schcer. En.,p. 243, Nyl. 
Flora 1878 , p. 246, Zw. Heid., n. 458. Lecanactis Kbr. Syst., p. 
277. Pyrenothea Mass. fiic.,p. 152, and P. byssacea ib., p. 150. 
P. stictica Er. A. E.,p. 452, p. p. ( spermogonifera ) and Parmelia 
impolita b, ibid., p. 150. Coniocarpon vdatum El. in Zw. Exs., n. 
48. Arthonia Nyl. Arth., p. 91, Pr. Gall., p. 411, Tuck. Gen., p. 
221. Sphceria byssacea Weig. Obs. Bot., p. 42, Verrucana Ach. 
Syn.,p. 97, Arthonia Almq., p. 25, this name based on a sterile 
plant.—Europe. 
f. develata, Nyl. Thallus thin or inconspicuous. Apoth. naked, 
brown and blackening, rounded and oblong. Spores oblong-ovoid, 
